13 best moss killers

Moss killers are products used in gardening and lawn care to eliminate or prevent the growth of moss in various outdoor spaces, such as lawns, patios, and gardens. Moss is a common issue in areas with excessive shade, poor drainage, or acidic soil conditions. It can compete with grass and other desirable plants for nutrients and space, leading to an unsightly and uneven lawn or garden.

Here are some key points about moss killers:

  1. Function: Moss killers are designed to kill existing moss and prevent its regrowth.They typically contain active ingredients that target moss specifically without harming desirable plants like grass or flowers.

  2. Active Ingredients: Common active ingredients in moss killers include ferrous sulfate, iron sulfate, potassium salts of fatty acids, and sometimes chemicals like glyphosate. These ingredients either directly kill the moss or alter the pH levels of the soil to make it less conducive to moss growth.

  3. Application: Moss killers come in various forms, such as liquid sprays, granules, or powders. They are applied directly to the affected areas following the manufacturer's instructions. It's essential to apply moss killer evenly and at the recommended rates to avoid damage to surrounding plants.

  4. Timing: The best time to apply moss killer is typically during the moss's active growing season, which is usually in the early spring or late fall. This is when moss is most vulnerable to treatment.

  5. Safety Precautions: When using moss killers, it's crucial to follow safety guidelines provided on the product label. This often includes wearing protective gear like gloves and eye protection and keeping children and pets away from treated areas until it's safe.

  6. Post-Treatment: After applying moss killer and allowing it to take effect, you may need to rake or manually remove dead moss to improve the appearance of your lawn or garden.

  7. Prevention: To prevent moss from returning, it's essential to address the underlying issues that promote its growth. This may include improving drainage, reducing shade, or adjusting the soil pH to make it less favorable for moss.

  8. Environmentally Friendly Alternatives: Some gardeners prefer natural or environmentally friendly alternatives to chemical moss killers. These can include using products like baking soda, lime, or even just improving lawn health through proper watering and fertilization to outcompete moss.

Remember that the effectiveness of a moss killer can vary depending on factors like the type of moss, the product used, and the application method. It's important to read and follow the instructions on the product label carefully and consider the specific needs of your lawn or garden when choosing a moss killer product.

Below you can find our editor's choice of the best moss killers on the market
  

Scotts MossEx - Kills Moss but Not Lawns, Contains Nutrients to Green The Lawn, Moss Control for Lawns, Helps Develop Thick Grass, Treats up to 5,000 sq. ft, 18.37 lbs.

Scotts

Based on 1 reviews Check latest price

Product description

Kill Moss, not your lawn, with Scotts MossEX. Scotts MossEX provides nutrients for your grass to prevent future Moss problems. Apply easily with a Scott spreader during winter or spring when Moss is actively growing.

  • Scotts MossEx kills moss, not lawns and helps develop thick grass
  • Best applied during winter or spring when the lawn is moist and tall grass has been mowed to expose low-growing moss
  • This moss control product also contains nutrients to green your lawn
  • Apply using a Scotts broadcast, rotary, drop, or Wizz spreader
  • Treats up to 5, 000 sq. ft.

User questions & answers

Question: Does this contain zinc
Answer: Scotts states that MOSSEX contains the Active Ingredient - Ferrous Sulfate Monohydrate
Question: I already planted my grass...Will this product stress new grass seedlings.... or should I just wait to apply after new grass has been mowed two times
Answer: According to the directions, it shouldn't matter but to be safe, I would wait until the lawn has been mowed a couple of times.
Question: can you use it with weed and feed
Answer: We recommend waiting 30 days between applying Scotts MossEx and Scotts Turf Builder Weed & Feed.
Question: is it safe for geggie growing
Answer: This product is for lawn use only. Keep 18-24 inches away from edible gardens/plants.

Product features

Scotts MossEX

Kill moss, not your lawn, with Scotts MossEX. Scotts MossEX provides nutrients to green your grass. One bag treats up to 5,000 sq. ft.

Strengthen & Green Your Lawn

Contains added nutrients to strengthen and green your lawn. For use on all lawns and grass types.

Kills Moss, Not Lawns

For best results, apply during winter or spring when moss is actively growing. Grass blades may turn black temporarily, however this condition will disappear after mowing. Please wait 2 to 4 weeks between applications.

Easy to Apply

It’s easy to use; first calculate the size of your lawn with the Scotts MyLawn app to determine coverage amount. Then pour product into your spreader and adjust setting per the product label requirements and apply. Best applied when lawn is moist and tall grass has been mowed to expose low growing moss. For use on all lawns and grass types.

BioAdvanced 704710B Moss and Algae Killer Ready-To-Spray, 32 oz

BioAdvanced

Based on 525 reviews Check latest price

Product description

Kills Moss, algae & Lichen on lawns, patios, roofs, buildings & more. Does not stain or harm lawns.

From the Manufacturer

One formula kills Moss and Algae wherever it grows. Treats lawns, patios PLUS roofs and buildings. With other brands you'd need two formulas to treat all areas. Kills: Moss, Algae, Lichen. Where to Use: Lawns, decks, patios, fences, mulch, driveways, gravel, roofs and buildings. When to Use: Anytime during the year. Active Ingredients: Potassium soap of fatty acids: 22.11%.

  • MOSS and ALGAE KILLER and CLEANER: Kills moss, algae, lichen, mold, and mildew wherever it grows and protects for months
  • 2-in-1 KILLER and CLEANER: Use on lawns, patios, roofs, buildings, decks, driveways, mulch, and more
  • KILLS WITHIN HOURS: Moss will quickly turn yellow and then brown, but must be physically removed once dead
  • NON-BLEACH FORMULA: BioAdvanced non-bleach formula will not stain or harm lawns
  • COVERAGE AREA: Treats up to 500 square feet

User questions & answers

Question: Will it kill plants under the eaves if we spray it on the roof
Answer: Not if you apply it so it dries and no rain forecast for a few days. You raise an interesting question since I have gutters that dilute and carry the water away. A great trick is to not waste so much using a hose....take any similar size spray bottle and pour 1/3 in and add 2/3 water. So it makes 3 bottles out of 1 hose bottle. Now when you spray it on a roof. Don't put the spray on enuff so it won't even run off the roof but it kills the roof moss. Apply again lightly to kill moss if 1 application doesn't get it first time.
Question: is this effective for removing tree mold and moss on typical asphalt home roofing material
Answer: YES. I found it effective after a single deep application. It may take up to a week for the moss the die off and break up.
Question: Does it work on lichen on shingles
Answer: Yes - this item will take care of lichens on shingles.
Question: Does it kill liverworts too
Answer: Don't know, sprayed on my roof and it did kill the moss!

Product features

BioAdvanced 2-in-1 Moss & Algae Killer & Cleaner

This is a fast-acting moss, algae, and lichen killer! Used on wood, concrete and asphalt, a single application will control moss and algae for up to one year. It does not stain concrete, pavement, stucco or wood. Simply attach bottle to your garden hose and spray.

Where can I use this product?

EZ-Grip One Touch Sprayer

Application for large areas just got easier. Simply attach this product your garden hose, turn on the water and use your thumb to activate the sprayer. Use this tip when finished spraying: turn off the hose, then turn the sprayer on once more to relieve the water pressure before detaching.

Use On & Around Your Home

May be used on lawns, ornamental gardens, around and on homes, roofs; cedar shakes and composition shingles; cedar siding; stucco; cedar, redwood and CCA-treated wood decks and fences; brick, stone and concrete walkways, sidewalks, driveways and more.

Non-Staining

Proprietary formula will not stain or cause damage to wooden structures when used according to label directions.

How To Apply

  • Attach to hose, turn on and walk backwards at a steady pace.

Lilly Miller Moss Out for Roofs And Walks Concentrate 54oz

Lilly Miller

Based on 345 reviews Check latest price

Product description

Lilly Miller 05601049 Moss Out is a safe solution for removing moss from decks, patios, sidewalks, walkways and rooftops. Moss Out extends the life of your roof for months, even years. It prevents the costly damage associated with moss and improves the aesthetic nature of your roof and outdoor surfaces. Instead of power washing or using bleach, which damage shingles, use Moss Out for safe, stain-free moss removal. Apply generously; application lasts up to a year.

  • Non-staining formula can be used on roofs, walks, decks and patios
  • Does not stain concrete, pavement, stucco, or wood
  • Economical concentrate
  • Active Ingredient: Ammonium soaps of fatty acids

User questions & answers

Question: I lost the instructions what is the ratlo for use in a pump sprayer
Answer: 1 part concentrate to 19 parts water
Question: Is there a moss killer you can use on your lawn that won't stain concrete
Answer: I use Scott's moss killer for lawns (it's ferrous sulfate). Put it on with a rotary spreader. Normally, I only spread on the infected areas (less sun and too much water) at a setting of 3.5. Be careful, as too much will also kill the grass. It might not kill the most completely, but it keeps it under control. Sun is a great remedy which is why "moss grows on the north side of a tree".
Question: Are there instructions to dilute and use in a pump sprayer
Answer: instructions to dilute and use in a pump sprayer
Question: Does it still require scrubbing to remove moss after its dead
Answer: I used it to kill moss on an asphalt roof...it only kills the moss, - you need to scrub the residue off- not a pleasant job...Dave Murray

Lilly Miller Moss Out Lawn Granules 20lb

Lilly Miller

Based on 183 reviews Check latest price

Product description

Lilly Miller 5601151 Moss Out Granules is the perfect solution for mossy lawns. When applied as directed, the moss will turn brown and start to die within a day. Moss Out makes moss easy to remove and prevents regrowth. Covers 5000 square feet of grass. Moss Out contains 10-percent iron and turns grass a greener, more vibrant shade. Does not cause excessive lawn growth.

  • Products quick results
  • Kills moss and promotes greener grass
  • Does not harm lawn
  • Contains 32.0-percent ferrous sulfate monohydrate and 68.0-percent calcium carbonate
  • Covers up to 5000 square feet

User questions & answers

Question: Prophylactic? moss returns every year to the shady part of my lawn. it is now fall. i don't see any moss. could i spread granules now to prevent moss
Answer: I believe it would be a waste of "Moss Out" material.Wait until you see it creeping forward and then use the spray.I do that and then use the granules in the early spring through summer.You need to be aggressive but too much is a waste.
Question: Can you use moss killer in winter months
Answer: I recently tested that question.Had several perfect outside work days with fair temps....45-55 deg.I used the concentrate to edge kill then broadcast LM granules.Definitely have progress with the moss control.It had been fairly dry recently here in NC so that may have helped.
Question: When is the best time to apply moss max? Does rain effect when to apply, and morning or when
Answer: The moss needs visiable moisture on it and it doesn’t matter when it is applied. Works great!
Question: Will this work in mulch beds
Answer: Do you have Moss? I had put down mulch in one of my places and it worked.

Wet and Forget 800003 Wet And Forget Moss Mold Mildew & Algae Stain Remover

Wet & Forget

Based on 3 reviews Check latest price

Product description

A unique combination of biodegradable selective surfactants for moss, mold, mildew and algae removal on any exterior surface. When diluted with water and applied, it immediately begins to work. Each time it rains, this safe, cleansing combination gently removes the moss, mold, mildew and algae without scrubbing or rinsing.

  • Gentle Spray & Leave Cleaner, No Scrubbing, Rinsing or Power Washing
  • Safe for virtually any surface, bleach-free, biodegradable, non-acidic, no phosphates
  • Concentrate makes 3 gallons
  • Surfaces stay clean 1+ years in most cases

User questions & answers

Question: will it clean my pavers from water rust ? They turn brown from water deposit
Answer: This product comes in three sizes, as far as I know: 1/2 gallon, 3/4 gallon, and 1 gallon. The dilutions with water are all the same so be careful of the price!
Question: What is the size of the bottle, how many gallons does it make
Answer: my understanding is, if you wet the grass first it should be ok. I have had no problem with plants at a cemetery when treating a headstone.
Question: I have plants and grass all around my house, if I use on my roof will it kill the plants below
Answer: You can, but I would not advise doing so without a respirator with fresh air tank if you are planning on spraying it. This stuff is potentially dangerous at full strength and breathing it even when diluted would be hazardous. Danger is very much related to concentration with this product and it does not take a lot. The active ingredient is N-Dodecyl/tetradecyl-N, N-dimethyl benzyl ammonium chloride also referred to as Benzalkonium Chloride. The following website gives the best description of the active ingredient and its uses: http://hztopchem.en.alibaba.com/product/989324687-219024270/Dodecyl_Dimethyl_Benzyl_ammonium_Chloride_1227_8001_54_5_63449_41_2_139_07_1.html#! Personally, I love this product for outdoor use , but see no need to use it indoors. A light bleach solution and/or simple soap and water and proper drying are a much safer indoor alternative. The company does offer an already diluted formula for use in indoor showers but I have not tried that product yet. If you do use it indoors please be certain of your math/calculations when diluting it and do not inhale any mist if sprayed. I am not the paranoid type. This is potent and must be handled with care.Also, as another responder pointed out. It does not rain inside, so you would see no removal of existing mold and stains with this product . It would only serve as a mold preventer. Even outside, the cleaning action is provided by the elements, namely rain and sun, the product simply kills the existing mold and prevents new mold growth.
Question: can I use it on inside walls
Answer: Yes
Question: Can this be used on Hardie board
Answer: Yes with some mild brushing after application. I would not use this due to local oxidation removal in the treated area.
Question: Will this clean the green mold off of vinyl siding using a power washer
Answer: This product is absolutely safe for automobiles and trucks. It can be used in a pressure washer or manually.
Question: is this safe for automobiles and trucks
Answer: This product does not work the same way as car soap, although it can be used to wash a car. The chemistry is geared toward environmental pollutants, dirt and some road grime. It is not a degreaser, so if road tar, grease and oil are the issue using regular Simple Green All Purpose Cleaner or Simple Green Pro HD might be more effective.
Question: Will this work well as a car soap
Answer: At Simple Green we have had some great feedback from consumers that have used the product on brick houses.
Question: Has anyone used this on a brick house
Answer: Simple Green Oxy Solve House and Siding Pressure Washer Concentrate can be used on concrete surfaces and is effective for most types of outdoor stains.
Question: does this work on concrete deck stains
Answer: A car wash brush (broom) and a mop bucket works well for me and I have tried various cleaners on Vinyl siding to remove dirt and the gross green stuff typical in shaded areas. Just dip and brush it around 2-3X (repeat as needed), rinse with a low pressure hose. This method even works up on a ladder and preferred over a pressure washer because the strong blast of water can damage the surface.
Question: does it work just with the garden hose
Answer: Simple Green Oxy Solve House and Siding Pressure Washer concentrate is very safe for pets. It is also safe for landscaping, so after cleaning you can rinse right into the soil where lawn or plants are.
Question: I'm looking for product that is safe for pets. Is this
Answer: The back side of the pad has a pocket on either end that slips over the ends of the mop head-the SB head "folds" to allow this, don't know if the Bona one does or not. Hope this helps!

Product features

Small changes in product size & weight lead to lower carbon emissions.

We created Compact by Design to identify products that, while they may not always look very different, have a more efficient design. With the removal of excess air and water, products require less packaging and become more efficient to ship. At scale, these small differences in product size and weight lead to significant carbon emission reductions.

Oxy Solve Total Outdoor Pressure Washer Cleaner - Removes Stains

Simple Green Oxy Solve Total Outdoor Cleaner lifts dirt and stains from mold, mildew, moss and algae from outdoor surfaces such as wood, plastic, concrete and more. Cleans using peroxide to brighten and renew surfaces without bleach.

Wet And Forget Outdoor

Wet & Forget Outdoor is the easiest way to eliminate outdoor mold, mildew, moss, lichen and algae. Wet & Forget Outdoor requires no scrubbing, no rinsing and no pressure washing. Simply apply to any exterior surface and let Wet & Forget Outdoor do the work for you! Wet & Forget Outdoor goes to work with the wind and rain to gently eliminate unsightly growths over time. Wet & Forget Outdoor is non-caustic, non-acidic and contains no bleach. Therefore, it can be used on any outdoor surface without fading or damaging the surface.

Wet & Forget Outdoor takes the hard work out of cleaning.

Wet & Forget Outdoor takes the hard work out of cleaning. It safely removes algae, moss, lichen, mold and mildew from outdoor surfaces. Are you tired of the never ending job of keeping mold and mildew at bay? Do you fight mold on concrete or brick? Moss on your roof? Do you fear the slippery algae on walkways? Or battle mold and mildew on your composite deck? We’ve got an easy solution for eliminating these issues without the use of elbow grease or harsh chemicals—Wet & Forget! Simply spray and walk away! There’s no scrubbing, no rinsing and no pressure washing!

Wet & Forget removes moss, algae, lichen, mold or mildew gently over time, without damaging the surface being cleaned. Wet & Forget is ideal for roof cleaning, deck cleaning, the siding on the north side of the house that attracts mold and mildew and even mildew prone boats that need cleaning! While bleach and most commercial moss, mold and mildew removal products are caustic and can corrode and discolor many surfaces, Wet & Forget’s gentle, nearly pH-neutral formula is non-caustic and safe to use on any outdoor surface.

Because Wet & Forget's gentle cleaning action uses the wind and rain to continue working over time, it keeps ugly stains at bay for a year or more on most surfaces. So, while your neighbors get out the bleach or pressure washer again and again, you can relax and enjoy your outdoor areas.

All you need to remove algae, moss, lichen, mold and mildew is a garden sprayer and a bottle of Wet & Forget. No more dreading tough outdoor cleaning jobs—just spray and walk away, and let Wet & Forget do the work for you!

Where to Use Wet & Forget Outdoor

Since Wet & Forget is non-caustic, non-acidic and contains no bleach, it can be used on ANY outdoor surface material. Some of the more popular surfaces include: roofs, siding, decks, walkways, driveways, brick, RVs and boats.

Exterior Home Surfaces: Covered Porches, Decks (All types), Downspouts, Driveways, Eaves, Gutters, Patios (All types), Pavers, Roofs (All types), Screens, Shingles (All types), Sidewalks, Siding (All types), Steps

Lawn & Garden: Awnings, Diving Boards, Fences (All types), Fountains, Gazebos, Greenhouses, Hammocks, Lanais, Lawn & Patio Furniture (All types), Outdoor Mats/Rugs, Outdoor Pots, Patio Umbrellas, Plastic Playhouses, Play Equipment, Pool Liners, Pool Surrounds, Retaining Walls, Shade Sails, Storage Units

Marine: Aluminum, Boat Bilges, Boats, Boat Carpeting, Boat Seats, Canvas, Fiberglass, Inflatable Boats, Sails, Teak

Camping: Cabins, Outdoor Furniture, Pop-Up Campers, RVs

Other: Astro Turf, Basketball Courts, Cars & Trucks, Log Homes, Monuments, Tennis Courts, Tombstones

Materials: Aluminum, Asphalt, Brick, Cement, Ceramic, Clay, Composite, Concrete, Dryvit/EIFS, Fabric, Fiberglass, Flagstone, Limestone, Marble, Natural, Painted, & Stained Wood, Painted Surfaces, Plastic, PVC, Rubber, Sandstone, Slate, Steel, Stone, Stucco, Teak, Textured Surfaces, Tiles, Vinyl

Commercial: Airports, Amusement Parks, Cemeteries, Freeways, Hospitals, Hotels & Motels, Parks, Public Buildings, Schools, Stadiums, Zoos. ..

and virtually any other surface you can think of!

CENTRAL GARDEN BRANDS 100503872 Lilly Miller Moss Out for Roofs and Walks Ready to Spray 27oz, 27 oz, Multicolor

Central Garden Brands

Based on 358 reviews Check latest price

Product description

Lilly Miller 100503872 Moss Out for Roofs is a convenient and effective way to de-moss a roof. Attach the included nozzle directly to your hose to easily spread the treatment over the entire rooftop surface. One application lasts up to a year. The sprayer applies the treatment up to 25 feet.

  • Kills moss quickly - see results in hours
  • Non-staining formula can be used on roofs, walks, decks and patios
  • Does not stain concrete, pavement, stucco, or wood
  • Attaches right to your garden hose – no mixing

User questions & answers

Question: Is this Safe for pets
Answer: yes my dogs were out in 1 hour
Question: Can the sprayer bottle be opened and refilled with the concentrate for reuse
Answer: Yes, you can refill it.
Question: Once sprayed, does moss fall off by itself
Answer: Once sprayed, the moss takes several days or weeks to die, and then shrinks down. You could try brushing it off your roof, but I can't get on my roof, and I let it shrink down to minimal size. I like this moss killer.
Question: How many ozs. of the lilly miller moss out do i put in my 1 gallon pump sprayer to do the roof
Answer: I would use 8 ounces per gallon of water. But there is another solution that will work even better for you. Go out and buy the cheapest laundry detergent you can find, I go to Costco and buy the 28 lb tub of powdered detergent. Put that on your roof in strips about 8 feet apart. As soon as it rains your moss problem has been resolved!

Scotts 40210 Turf Builder with Moss Control, 10,000 sq. ft

Based on 656 reviews Check latest price

Product description

Scotts Turf Builder with Moss Control kills moss—guaranteed. At the same time, it feeds your lawn, thickening grass to prevent any future moss problems. Apply Scotts Turf Builder with Moss Control wherever moss is actively growing, and say hello to a beautiful, green lawn!

  • Kills moss and thickens grass to fill in bare spots
  • Kills moss, not lawns—
  • Improves lawn's ability to absorb water and nutrients versus an unfed lawn
  • Apply during winter or spring when moss is actively growing
  • Feeds to help prevent future moss problems. Fertilizer Analysis 23-0-3

User questions & answers

Question: What do you do with the moss once its "dead"? Ive used this and the moss looks dead now but has still been there all summer, do you have to dig it up
Answer: bpShum, once the moss is dead we recommend raking it out before reseeding.
Question: Why won’t this actually ship when I try to buy it
Answer: no it does not
Question: How often to apply
Answer: I only apply it in early May ( early Spring ) = I think that should suffice - its pretty strong and works well
Question: Will this work in Michigan
Answer: Yes! Best product out there for moss control, we live in the far NW corner of Washington state, a couple of treatments of this and the reseeded, great healthy lawn ready for summer, also safe of animals once you water it in.

Product features

Scotts Turf Builder with Moss Control

Use Scotts Turf Builder with Moss Control to kill moss and thicken your grass to fill in bare spots and prevent any future moss problems.

Kills Moss, Not Lawns

Kill moss and feed your lawn to develop thick, green grass to discourage moss from returning. Also, it can help improve the lawn’s ability to absorb water and nutrients versus an unfed lawn.

When to Apply

For best results, apply using a Scotts Spreader. Apply to a moist lawn after the tall grass has been mowed to expose low growing moss. Apply during winter or spring when moss is actively growing, use on all grass types.

Safer Brand 5325-6 SafeSafer Brand 32Ounces 5325 Moss and Algae Killer and Surface Cleaner Ready to Use 32O, 1 Pack

Safer Brand

Based on 116 reviews Check latest price

Product description

Safer Brand Moss and Algae Killer and Surface Cleaner Ready to Use 32Ounces 5325

From the Manufacturer

This moss and algae killer and surface cleaner utilizes the effectiveness of potassium salts of fatty acids. This product is the most economical and convenient organic solution to the wide array of moss and algae annoyances on the market! Safe for use on roofs, decks, siding, walkways, home greenhouses, growing containers and benches, structural surfaces, hardened barks of trees, lawns and turf. OMRI-listed and compliant for use in organic gardening.

  • Moss, algae killer and surface cleaner
  • Most economical and convenient organic solution
  • This killer utilizes the natural effectiveness of potassium salts to rid your deck, roof, siding, walkways, lawn and more of algae and moss
  • Ready to use formula no mixing required; USDA national organic program compliant for use in organic gardening
  • OMRI Listed and compliant for use in organic gardening

User questions & answers

Question: Just curious, about how something can kill moss and bugs ? The ingredients are the same as their insect killing soap, just a way lower concentrate
Answer: I don't know if it kills insects but this soap will definitely kill moss and alga.
Question: Does it kill lichen
Answer: This product can be used to kill algae, mosses, lichens, liverworts and grime.
Question: Safe for window seals in car
Answer: I am a retired chemist. This product is the salt of a fatty acid and as such I do not believe it will cause any damage to window seals in cars which are usually some kind of synthetic rubber.
Question: anyone try it on wood decking (for green algae
Answer: Yes it works well for algae on treated lumber wood decking, but you need to wash it off well afterwards because it gets very slippery ( remember this product is a soap!).

Wet & Forget Roof and Siding Cleaner for Easy Removal of Mold, Mildew and Algae Stains, Bleach-Free Formula, 48 OZ. Hose End,805048,Blue

Wet & Forget

Based on 5 reviews Check latest price

Product description

The new Wet and Forget rapid application hose end makes cleaning moss, mold, mildew, and algae quick and easy. Treat an entire house, roof, driveway, or deck in minutes. The bottle attaches directly to your hose and sprays up to 30 feet, allowing you to clean hard to reach areas like second story siding and roofs. One bottle of Wet and Forget goes a long way, covering up to 2,000 square feet. Wet and Forget works with the wind and rain to eliminate unsightly black and green stains over time, with no scrubbing. Just spray it on, and forget it. Wet and Forget contains no bleach or phosphates and is non acidic, so it is safe for use around landscaping and plants.

  • Sprays up to 30 Feet for Hard-To-Reach Areas Like Second Story Siding or Roofs
  • Up to 2,000 Square Feet Coverage per Bottle
  • Easy Spray and Leave Outdoor Cleaner- No Rinsing or Scrubbing
  • Not for sale in California; Non-refillable container

User questions & answers

Question: Do you have to clean windows after use
Answer: Yes, you do need to wipe down your windows after spraying. I waited until the wet n forget had dried before wiping the windows clean. The streaks came off so easily I didn’t need windex.
Question: Is it refillable
Answer: NO it is not the same strength. They get you with this. It would have been nice to get to refill it but sadly it is not the same. I did do this but it did not even touch the moss I was treating.
Question: Can anyone update me 6 months after you applied it
Answer: I used this product about 7 months ago and was disappointed in it. However, after 7 months of rain and snow, my garage is a lot cleaner. I would recommend this product, but be aware that it will take months for you to see a difference.
Question: can i just buy the sprayer
Answer: As samwichse observes, the Hose End product is 3 times more concentrated than the "concentrate", but is diluted by the sprayer 3 times more, resulting in the same amount of active ingredient in the final spray. Coverage rates are around 2000 square feet maximum for both products. In the end, according to my calculations, the hose end product is only about 2 cents per ounce more than the concentrate - 24 cents vs 22. Well worth it for the extra convenience, IMHO. And, no, I don't work for Wet and Forget. Just really like their product.

30 SECONDS Spray & Walk Away, 1 Gallon - Concentrate

30 SECONDS Cleaners

Based on 376 reviews Check latest price

Product description

Kills Lichen, Moss, Mold & Algae in one easy step. Simply Spray & Walk Away. 30 SECONDS¨ Spray & Walk Away¨ is a slow release formula that works over time. Mother Nature does the work for you, eroding the treated matter, while it decays over the coming weeks. Perfect for those LARGE surface areas that you can Spray & Walk Away¨; Subdivision walls, roofs (composite, glazed, Tiled and Shingles), pathways, sealed brickwork and concrete, asphalt driveways, vinyl and aluminum siding, wood decks and many other hard surfaces. And best of all it saves water, time and money in not having to pressure wash or rinse off. Safe around play areas, gardens and pets when used as directed. Contains no bleach and is phosphate free.

  • 30 SECONDS Spray & Walk Away kills lichen, moss and algae
  • No pressure washing, rinsing, scrubbing, or hosing required. Simply spray and walk away. Results become visible over time
  • Works on many outdoor surfaces like roofs, sealed concrete, asphalt driveways and more
  • Bleach and phosphate-free, with a neutral pH
  • Improves traction on many surfaces, as well as appearance

User questions & answers

Question: Will it clean a white marble headstone
Answer: We didn’t find this stuff cleaned anything. We had much better success with Armour Housewash but truly believe a mixture of 3 parts water to 1 part bleach is the best for removing mildew and moss.
Question: I was told to use 30-second cleaner on mold behind my boat electronics. Mechanic said to turn off batteries, spray and let it dry. Is that safe
Answer: I am sorry I can't help you with that.
Question: How will this affect my shrubbery which is right next to the house
Answer: Yes. It is important to do your best to avoid over spray and to rinse your plants well as soon as possible if any contact does occur. If you need something that is safe to use round your lawn and landscaping, then we recommend you use 30 SECONDS Outdoor Cleaner.
Question: Can this product be used safely on composite decking? Specifically Wolf decking
Answer: I have only used it on wood, stone, and brick.

Product features

30 SECONDS Spray & Walk Away

30 SECONDS Spray & Walk Away is the best choice when looking to KILL Lichen, Moss, Mold and Algae, especially on those large surface areas where rinsing is a hassle. Like the name says, Simply Spray & Walk Away! Works over time with Mother Nature to erode away the dead and decaying material. Perfect on roofs, decks, sidewalks, driveways, and any hard surface where you don’t need immediate results.

Designed with Roofs in Mind

Simply Spray & Walk Away. Safe on most all roofs including composite, glazed tile, shingles, and more.

Ideal to Treat Large Areas Outdoors

Application is quick and easy, making Spray & Walk Away the best choice for large areas such as walkways, paths and drives. Treat a variety of surfaces such as sealed brickwork, concrete, asphalt, and wood decks.

Kills Lichen, Moss, Mold and Algae

Works overtime to Kill growth and uses the wind and the rain to erode away dead material. Even hardy lichens and mosses are no match. Treats siding including vinyl, aluminum, wood and composite.

Save Time and Water, Get a Longer Lasting Clean

Homeowners and contractors alike love Spray & Walk Away because it saves water, time and money not having to pressure wash or rinse off. Quickly and easily treat most all hard outdoor surfaces. Simply Spray & Walk Away and let Mother Nature do the work for you.

64 oz Hose End Attachment 30 SECONDS Spray & Walk Away 3 PACK

Killing Lichen, Moss, Mold and Algae is a breeze. Simply attach to your garden hose, Spray & Walk Away.

Ideal for hard to reach areas such as second stories or roofs.

Treats approximately 220-660 sq ft depending on the level of growth and porosity of the surface.

Mutli-Packs available exclusively on Amazon

1 Gallon Concentrate 30 SECONDS Spray & Walk Away 2 PACK

Simply mix, Spray & Walk Away to KILL Lichen, Moss, Mold & Algae. Save water, time, and money not having to rinse or pressure wash.

1 Gallon of concentrate makes 6 gallons of ready to use product and treats 750-2250 sq ft depending on growth and porosity of the surface.

Bonide (BND728) - MossMax Moss Killer, Ready to Spray, Outdoor Algae, Moss, & Lichens Control (32 oz.)

Bonide

Based on 68 reviews Check latest price

Product description

Not every green plant is an asset to your lawn; in fact, they become harmful. There is now an easy solution to your problem, Bodine's MossMax Ready-to-Spray. Perfect for killing moss, algae, and lichens on your deck, roof, siding and more, your home and garden will look perfect!

  • MOSS KILLER - MossMax is effective in controlling mold, mildew, mosses, algae, lichens, & liverworts. It is not designed to control species of mold & mildew that are considered public health pests.
  • OUTDOOR USE - This product is designed for use on lawns, ornamental gardens, around & on homes, roofs, shingles, cedar siding, stucco, decks, fences, brick, stone, hardened bark of trees, patios, & more.
  • PROMOTES HEALTHY LAWNS - MossMax Moss Killer knocks out moss so your grass can grow thicker and richer.
  • YEAR ROUND APPLICATION - The product can be used any time moss is actively growing. Best results are obtained with actively growing moss in the spring or fall. Application during cold weather may delay appearance of moss, mold, & mildew damage.
  • READY TO SPRAY - This product arrives in a container with an attached hose-end sprayer. Simply connect a garden hose to the sprayer and begin application. No need to use a hand pump sprayer. Carefully read label before use.

User questions & answers

Question: Is it safe for Trex decks
Answer: it's safe on roofs, don't know about trex?
Question: Will this reach a one story garage roof while standing on the ground? Trying not to have to climb a ladder
Answer: If your garden hose can spray water to your roof then you should be good. The bottle is attached to the hose and does not significantly degrade the pressure or range of the spray. I did use it on a 1 story garage roof with a well water pump and had no issues. Property slopes so the back area I did use a ladder and that was pretty easy
Question: Has anyone tried this on vinyl siding? It says you can use it on siding but what type of siding
Answer: This did absolutely nothing for moss. I highly doubt it would do anything to clean siding. I use home wash from home depot. Its the one in the green bottle. Works the best out of all the products i tried
Question: Safe to spray this product in my flower and shrub gardens
Answer: I bought this to spray on my peach tree, some large decorative rock in my garden and also on a paved walkway. I don't think I would use it on flowers or shrubs as no where in the product usage does it mention flowers or shrubs. I sprayed my peach tree at the end of the growing season (Fall) and the Lichen appeared like a white fungus on the branches. Upon spraying with the MossMax the Lichen turned yellow, but stayed on the branches. Now being spring my peach tree is in full bloom again.

Product features

Bonide MossMax

MossMax quickly kills lawn moss, giving your lawn grass the opportunity to fill in & reclaim the lawn. Enjoy a beautiful moss free lawn!

This product is designed for use on lawns, around flowers, & ornamental shrubs. Not intended for indoor use.

Promotes a Green Lawn

MossMax Lawn Granules not only kills lawn moss quickly, it also turns lawns a deep green.

For normal infestations of moss, apply this product at the rate of 4 pounds per 1,000 square feet. For heavy infestations of moss, apply at the rate of 8 pounds per 1,000 square feet.

This product is conveniently ready to use when it arrives. Apply with a standard lawn spreader. No need to mix or spray anything.

Lilly Miller Moss Out for Lawns Ready to Spray 32oz, 1-(Pack)

Lilly Miller

Based on 409 reviews Check latest price

Product description

Hose 'n Go Moss Out! For Lawns is the fast, easy way to kill moss in lawns. Once moss is gone, the grass is free to grow and thrive. This easy-to-use container attaches right to your garden hose, so there is no mixing! The moss in your lawn will turn black and die within hours. The grass will gradually fill in thin and bare spots. You can help it along by adding Lilly Miller Ultragreen or Super Sweet lime, that's right for your yard.

  • Kills lawn moss quickly
  • Works in Hours!
  • Liquid iron gives superior results

User questions & answers

Question: Can I spray my crapemytrles, moss on trunks
Answer: Yes also stone walls, buy concentrate then mix in sprayer goes further, the most will come back persistent
Question: Did anyone rake out the blackened moss using a regular lawn mower with a thatching blade ( instead of the normal cutting blade
Answer: I used a drag behind thatcher on my lawn tractor. It worked fine and also loosened the soil a bit. I had a heavy concentration of moss under my trees in the back yard. I think the real question is have you used that thatcher before? did it harm the lawn at all?
Question: How long after applying should I wait before planting new grass seed
Answer: After the moss dies, you rake it out creating bare spots. Now you can plant the grass.
Question: Will moss out harm plants other than lawns
Answer: I believe the label says to avoid ornamental plants. It does stain your grass a dark color but the grass returns to its green color after a few weeks. The product does kill the ground moss though. It was dead the following morning.

Scotts Moss Control Granules for Lawns, 1,250-Sq Ft

Scotts

Based on 158 reviews Check latest price

Product description

Fast, easy to apply Complete control of lawn Moss problems. Apply spring, fall, Winter or any time Moss is actively growing. Contains iron to turn lawn deep green without excess growth. Contains no fertilizer.

  • Fast, easy to apply complete control of lawn moss problems
  • Apply spring, fall, winter or any time moss is actively growing
  • Contains iron to turn lawn deep green without excess growth

User questions & answers

Question: Where is this product manufactured
Answer: Scotts Moss Control Granules for Lawns is manufactured in the USA.
Question: Will this stain concrete pavers
Answer: I just used the moss control in the middle of the yard, it worked very well, I did not get it near pavers, sorry I wasn’t more helpful
Question: Can you use this with the Moss Control/Fertiliser without burning grass
Answer: You must wait one week before or after to apply fertilizer with weed control.

Product features

Kills Moss, Not Lawns - Guaranteed!

Scotts Moss Control Granules for lawns kills moss in lawns.

Use Anytime Moss Is Actively Growing

Spread product over your lawn to stop moss in it’s tracks. Plus, Scotts Moss Control contains added nutrients to green your lawn.

Guaranteed

Satisfaction guarantee or your money back.

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