10 Best Deck Cleaner And Mildew Remover Safe For Plants of 2026

Last updated on 04/11/2026
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Best Choice
1
9.8
Exceptional
Deck & Wood Cleaner + Brightener Removes Mold, Mildew, Stains, and Tannins, 32 oz. Combo 2 Part System Restores 1200 sq. ft.
DeckWise

Deck & Wood Cleaner + Brightener Removes Mold, Mildew, Stains, and Tannins, 32 oz. Combo 2 Part System Restores 1200 sq. ft.

Why we love it
  • Cleans and brightens effectively.
  • Ideal for yearly maintenance.
  • Biodegradable and lawn-friendly.
Main Highlights
  • Each container of 32 oz. concentrate mixes 10 gallons, 20 gallons total, cleaning and brightening approximately 1200 sq. ft.
  • Excellent for yearly wood deck, siding & fencing maintenance or use before staining wood
  • Part 1 Cleans exterior wood, removes, mold, mildew, gray and dirt
  • Part 2 Brightens exterior wood, removes tannin stains and restores wood pH
  • Combo pack includes one 32 oz. cleaner and one 32 oz. brightener
  • Biodegradable and will not harm your lawn, trees, shrubs or landscaping
9.8
Exceptional
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🛡️Trusted by 100M+ UsersWhy?
Best Value
2
9.7
Exceptional
Deck & Wood Cleaner + Brightener Removes Mold, Mildew, Stains, and Tannins, 32 oz. Combo 2 Part System Restores 1200 sq. ft.
DeckWise

Deck & Wood Cleaner + Brightener Removes Mold, Mildew, Stains, and Tannins, 32 oz. Combo 2 Part System Restores 1200 sq. ft.

Why we love it
  • Cleans and brightens effectively.
  • Ideal for yearly maintenance.
  • Biodegradable and lawn-friendly.
Main Highlights
  • Each container of 32 oz. concentrate mixes 10 gallons, 20 gallons total, cleaning and brightening approximately 1200 sq. ft.
  • Excellent for yearly wood deck, siding & fencing maintenance or use before staining wood
  • Part 1 Cleans exterior wood, removes, mold, mildew, gray and dirt
  • Part 2 Brightens exterior wood, removes tannin stains and restores wood pH
  • Combo pack includes one 32 oz. cleaner and one 32 oz. brightener
  • Biodegradable and will not harm your lawn, trees, shrubs or landscaping
9.7
Exceptional
Amazon Logo
3
9.7
Exceptional
Wet & Forget Moss, Mold, Mildew, & Algae Stain Remover Multi-Surface Outdoor Cleaner Concentrate, Original, 64 Fluid Ounces (2 Pack)
Wet & Forget

Wet & Forget Moss, Mold, Mildew, & Algae Stain Remover Multi-Surface Outdoor Cleaner Concentrate, Original, 64 Fluid Ounces (2 Pack)

Why we love it
  • Effortless cleaning with no scrubbing.
  • Long-lasting results up to one year.
  • Safe for various outdoor surfaces.
Main Highlights
  • Concentrate outdoor cleaner removes stains caused by moss, mold, mildew, with no scrubbing or rinsing just wet it and forget it for hard, sealed non-porous surface including driveway, patio, roof, siding, deck, sealed concrete, and more
  • Dilute 1 part concentrate to 5 parts water and apply with a garden sprayer generously to a dry, debris-free surface in mild temperatures, do not rinse or apply when rain is expected within 4-5 hours of application; unused portion can stored for next use
  • Cleans over time with the wind and rain, green stains clean up within 1-2 weeks, black stains or heavy, stubborn stains can take several months, long-established stains may take 6-12 months; surfaces can stay clean up to 1 year or longer
  • It is bleach free but spray 100 feet away from any water source and flush plants with water before and after application; includes 2 x 0.5 gallons concentrate which make 2 x 3.0 gallons
  • Includes 2 x 0.5 gallons concentrate which make 2 x 3.0 gallons of cleaner, has an unlimited shelf life, and results last for a minimum of 1 year
  • One bottle treats 375 - 1,125 square feet, heavy stained and porous surfaces will absorb more product
9.7
Exceptional
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4
9.5
Superb
Wet & Forget Outdoor Moss, Mold, Mildew, & Algae Stain Remover Multi-Surface Cleaner, Ready to Use, 64 Fluid Ounces, 4 Pack
Wet & Forget

Wet & Forget Outdoor Moss, Mold, Mildew, & Algae Stain Remover Multi-Surface Cleaner, Ready to Use, 64 Fluid Ounces, 4 Pack

Why we love it
  • Easy application, no scrubbing needed.
  • Cleans surfaces over time naturally.
  • Non-toxic, safe for the environment.
Main Highlights
  • Wet & Forget Ready To Use Outdoor Cleaner 4 pack comes with a high-capacity trigger sprayer for quick application to smaller surfaces; removes green and black stains caused by moss, mold, mildew, and algae, no scrubbing, no rinsing, no pressure washing, just wet it and forget it on multiple surfaces including, porch steps, headstones, fountains, planters, concrete, canvas, and upholstery
  • Use attached sprayer apply generously to dry surface on a cool day to avoid rapid evaporation of product, do not rinse, apply when rain is not forecasted within 4-5 hours, apply when the temperature is above 32° F
  • Cleans over time with the wind and rain, green stains clean up within 1-2 weeks, black stains or heavy, stubborn stains can take several months, long-established stains may take 6-12 months; surfaces can stay clean up to 1 year or longer
  • It is bleach free and non-acidic; spray 100 feet away from lakes, ponds, rivers, and streams and flush plants with water before and after application
  • Includes 4 - 64 Fl. Oz bottles of cleaner with unlimited shelf life; one bottle treats 60 - 180 square feet, heavy stained and porous surfaces will absorb more product
9.5
Superb
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5
9.4
Superb
Save 3%
Wet & Forget Outdoor Moss, Mold, Mildew, & Algae Stain Remover Multi-Surface Cleaner, Ready to Use, 64 Ounce (Pack of 4)
Wet & Forget

Wet & Forget Outdoor Moss, Mold, Mildew, & Algae Stain Remover Multi-Surface Cleaner, Ready to Use, 64 Ounce (Pack of 4)

3% Off
Why we love it
  • No scrubbing required.
  • Bleach free and non acidic.
  • Quick spray covers large areas.
Main Highlights
  • The information below is per-pack only
  • Wet & Forget Ready To Use Outdoor Cleaner comes with a high-capacity trigger sprayer for quick application to smaller surfaces; removes green and black stains caused by moss, mold, mildew, and algae, no scrubbing, no rinsing, no pressure washing, just wet it and forget it on multiple surfaces including, porch steps, headstones, fountains, planters, concrete, canvas, and upholstery
  • Use attached sprayer apply generously to dry surface on a cool day to avoid rapid evaporation of product, do not rinse, apply when rain is not forecasted within 4-5 hours, apply when the temperature is above 32° F
  • Cleans over time with the wind and rain, green stains clean up within 1-2 weeks, black stains or heavy, stubborn stains can take several months, long-established stains may take 6-12 months; surfaces can stay clean up to 1 year or longer
  • It is bleach free and non-acidic; spray 100 feet away from lakes, ponds, rivers, and streams and flush plants with water before and after application
  • Each bottle treats 60 to 180 square feet; heavy stained and porous surfaces will absorb more product
9.4
Superb
Save 3%
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6
9.2
Superb
DeckMax Premium Deck Cleaner Kit | Deck Cleaner and Mildew Remover | Cleans up to 1,500 Sq. Ft. | Safe for Trex, Timbertech & Wood Decking | Powerful & Eco-Friendly Deck's Cleaning Solution
DeckMAX

DeckMax Premium Deck Cleaner Kit | Deck Cleaner and Mildew Remover | Cleans up to 1,500 Sq. Ft. | Safe for Trex, Timbertech & Wood Decking | Powerful & Eco-Friendly Deck's Cleaning Solution

Why we love it
  • Powerful stain removal capabilities.
  • Includes premium scrub brush.
  • Safe for family and pets.
Main Highlights
  • POWERFUL DECK CLEANER & MILDEW REMOVER – This deck cleaner and mildew remover is a professional-grade deck cleaning solution, effectively eliminating black and green stains, mold, and built-up grime on wood and composite surfaces.
  • COVERS UP TO 1,500 SQ. FT. – MAXIMUM VALUE! – Our highly concentrated deck wash cleaner for wood is designed for superior cleaning performance, making it one of the best composite deck cleaner available for Trex, Timbertech, Fiberon, and other decking brands.
  • INCLUDES PREMIUM SCRUB BRUSH FOR DEEP CLEANING – Unlike competitors, we include a high-quality natural bristle brush to help scrub away tough stains, making this a deck cleaner for pressure washer or manual cleaning.
  • SAFE & ECO-FRIENDLY – ZERO VOCs, NO HARSH SOLVENTS – This wood deck cleaner is free of volatile organic compounds and harmful chemicals, ensuring it’s safe for your family, pets, and surrounding plants.
  • ELIMINATES STAINS - This powerful, concentrated composite and wood cleaner is specifically formulated to remove environmental black and green staining on composite and wood decking. In addition it releases ground in dirt and grease from your composite or wood decking, making it look squeaky clean!
  • RESTORES YOUR DECK TO A LIKE-NEW LOOK – Our composite deck cleaner for Trex penetrates deep into the surface, lifting dirt, grease, and stains, leaving your deck looking refreshed and revitalized.
9.2
Superb
Amazon Logo
7
9.1
Superb
Wash Safe™ SPRAY & CLEAN Commercial-Strength Composite Deck Cleaner | Remove Black Stains | Cleans Up to 1,500 sq. ft. | Deep Set Cleaning, 1 Gal.
Wash Safe Industries

Wash Safe™ SPRAY & CLEAN Commercial-Strength Composite Deck Cleaner | Remove Black Stains | Cleans Up to 1,500 sq. ft. | Deep Set Cleaning, 1 Gal.

Why we love it
  • Safe and non-hazardous formula.
  • Deep cleans stubborn black stains.
  • No scrubbing needed for cleaning.
Main Highlights
  • Safe, Powerful Formula: Designed to safely clean composite decks, our cleaner is non-hazardous with only a minimal amount of bleach. It cleans without discoloring or damaging your deck, ensuring lasting results without the harsh chemicals.
  • Deep Cleans Stubborn Stains on Composite Decks: Spray & Clean Composite Deck Cleaner effectively removes black stains from moss, mold, algae and lichen from the pores of composite decking, including Trex, TimberTech, Fiberon, and Calibamboo. Unlike typical cleaners, our formula penetrates deep, leaving your deck spotless.
  • No Scrubbing Required: Our specialized formula includes a small percentage (5%) chlorine bleach combined with surfactant chemicals that transport it into the deck's pores to break down deep-set stains without any scrubbing or harsh abrasion.
  • Effective for All Composite Decking Brands: Whether you have Trex, TimberTech, Fiberon, or other composite decking, Spray & Clean works wonders on any brand, removing stubborn black stains with minimal effort.
  • Easy Application, No Expensive Gear: Works with a garden hose, pump sprayer, or simple high-pressure nozzle; no special equipment required. Users achieve pro-level cleaning at home without renting or buying pressure washers or specialty machines.
  • Trusted by Repeat Customers: Many buyers reorder yearly after seeing consistent, long-term results. Saves time, reduces maintenance costs, and outperforms other composite deck cleaners that failed to remove stubborn stains from mold, mildew, and black spots.
  • Proven to Remove Years of Tough Stains – Customers report restoring 8–15 years of built-up black mold, mildew, algae, and “leopard spots” on Trex, TimberTech, Fiberon and other composite decking in one application, with dramatic before-and-after results.
9.1
Superb
Amazon Logo
8
8.9
Excellent
Wet & Forget Moss, Mold, Mildew, & Algae Stain Remover Multi-Surface Outdoor Cleaner Concentrate, Original, 128 Fluid Ounces
Wet & Forget

Wet & Forget Moss, Mold, Mildew, & Algae Stain Remover Multi-Surface Outdoor Cleaner Concentrate, Original, 128 Fluid Ounces

Why we love it
  • Effortless cleaning, no scrubbing required.
  • Cleans large areas efficiently.
  • Safe for the environment and surfaces.
Main Highlights
  • Wet & Forget Concentrate Outdoor Cleaner removes green and black stains caused by moss, mold, mildew, and algae, no scrubbing, no rinsing, no pressure washing, just wet it and forget it on multiple surfaces including driveway, patio, roof, siding, deck, vinyl, wood, concrete, canvas, aluminum, and upholstery
  • Mix 1 part Wet & Forget with 5 parts water in a garden sprayer, spray dry surface on a cool day to avoid rapid evaporation of product, do not rinse, apply when rain is not forecasted within 4-5 hours, apply when the temperature is above 32° F; unused product can be stored mixed and ready in sprayer for future applications with unlimited shelf life
  • Cleans over time with the wind and rain, green stains clean up within 1-2 weeks, black stains or heavy, stubborn stains can take several months, long-established stains may take 6-12 months; surfaces can stay clean up to 1 year or longer
  • It is bleach free and non-acidic; spray 100 feet away from lakes, ponds, rivers, and streams and flush plants with water before and after application
  • One bottle treats 750 - 2,250 square feet, heavy stained and porous surfaces will absorb more product
8.9
Excellent
Amazon Logo
9
8.8
Excellent
Save 6%
Wet & Forget Moss, Mold, Mildew, & Algae Stain Remover Multi-Surface Outdoor Cleaner Concentrate, Original, 128 Fluid Ounces
Wet & Forget

Wet & Forget Moss, Mold, Mildew, & Algae Stain Remover Multi-Surface Outdoor Cleaner Concentrate, Original, 128 Fluid Ounces

6% Off
Why we love it
  • Effortless cleaning with no scrubbing.
  • Versatile for many surfaces.
  • Long-lasting stain removal results.
Main Highlights
  • Wet & Forget Concentrate Outdoor Cleaner removes green and black stains caused by moss, mold, mildew, and algae, no scrubbing, no rinsing, no pressure washing, just wet it and forget
  • Surfaces including driveway, patio, roof, siding, deck, vinyl, wood, concrete, canvas, aluminum, and upholstery
  • Mix 1 part Wet & Forget with 5 parts water in a garden sprayer, spray dry surface on a cool day to avoid rapid evaporation of product, do not rinse, apply when rain is not forecasted within 4-5 hours
  • Apply when the temperature is above 32° F; unused product can be stored mixed and ready in sprayer for future applications
  • Cleans with the wind and rain, green stains clean up within 1-2 weeks, black stains or heavy, stubborn stains can take several months, long-established stains may take 6-12 months; surfaces can stay clean up to 1 year or longer
8.8
Excellent
Save 6%
Amazon Logo
10
8.7
Excellent
30 SECONDS Outdoor Mold & Mildew Cleaner & Stain Remover Concentrate | 128 fl. oz. | 2 Pack
30 SECONDS

30 SECONDS Outdoor Mold & Mildew Cleaner & Stain Remover Concentrate | 128 fl. oz. | 2 Pack

Why we love it
  • Restores surfaces to vivid state.
  • Effectively removes tough stains.
  • Safe for lawns and plants.
Main Highlights
  • REMOVES STAINS FROM ORGANIC GROWTH ON YOUR OUTDOOR SURFACES: 30 SECONDS Outdoor cleaner cleans stains from mold, mildew, dirt and grime
  • POWERFUL CONCENTRATED FORMULA: Our concentrated formula is easy use. Simply mix a 1:1 ratio with water and you are ready for a rapid clean
  • IMMEDIATE RESULTS ON A VARIETY OF OUTDOOR SURFACES: Works on many outdoor surfaces including decks, composite and stained surfaces. Concrete, bricks and masonry. Gutters, siding, canvas, plastic and stucco. Fences, arbors and painted surfaces. You can see results immediately!
  • PLANT AND LAWN SAFE: When used as directed, 30 SECONDS outdoor cleaner is safe to use around landscaping, plants, and your lawn. The formula breaks down once rinsed into the soil
8.7
Excellent
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Related Deals You Might Like for Deck Cleaner And Mildew Remover Safe For Plants

📊We scanned 849 products
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We reviewed the most relevant Deck Cleaner And Mildew Remover Safe For Plants offers across Amazon and leading retailers, covering major brands and models. Our shortlist features trusted names like DeckWise, Wet & Forget, DeckMAX, Wash Safe Industries, 30 SECONDS, known for dependable quality and smart design.
⭐
To determine today's best Deck Cleaner And Mildew Remover Safe For Plants, we analyzed 4246 real customer and expert reviews, focusing on satisfaction, real-world performance and long-term reliability. We also weigh each review's relevance, authenticity and freshness for a fair comparison.

Here's what we found:

🏆 #1
Deck & Wood Cleaner + Brightener Removes Mold, Mildew, Stains, and Tannins, 32 oz. Combo 2 Part System Restores 1200 sq. ft.

Our overall winner is Deck & Wood Cleaner + Brightener Removes Mold, Mildew, Stains, and Tannins, 32 oz. Combo 2 Part System Restores 1200 sq. ft. by DeckWise. It stands out for the right balance of quality, performance and value.

✨ What sets it apart:
✓Cleans and brightens effectively.
✓Ideal for yearly maintenance.
✓Biodegradable and lawn-friendly.
💎 Best Value
Deck & Wood Cleaner + Brightener Removes Mold, Mildew, Stains, and Tannins, 32 oz. Combo 2 Part System Restores 1200 sq. ft.

The best value for most shoppers is Deck & Wood Cleaner + Brightener Removes Mold, Mildew, Stains, and Tannins, 32 oz. Combo 2 Part System Restores 1200 sq. ft. by DeckWise, with consistently high satisfaction across expert and customer reviews.

💰 Best Deal
Wet & Forget Moss, Mold, Mildew, & Algae Stain Remover Multi-Surface Outdoor Cleaner Concentrate, Original, 128 Fluid Ounces

The strongest deal right now for Deck Cleaner And Mildew Remover Safe For Plants is Wet & Forget Moss, Mold, Mildew, & Algae Stain Remover Multi-Surface Outdoor Cleaner Concentrate, Original, 128 Fluid Ounces at Wet & Forget, currently at 6% off.

🔄Our Deck Cleaner And Mildew Remover Safe For Plants ranking is updated regularly to reflect new releases and price changes—check back for the latest picks and deals.