10 Best Moss Killers 2025 in the United States

The Natural Elements Weed Killer is an all-natural and safe option for those looking to eliminate unwanted weeds and grasses around their homes. It is pet-safe and safe to use around children, making it a great choice for families. The product uses natural ingredients such as sodium chloride, salt water, commercial vinegar, and soap, which means you don't have to worry about harmful chemicals. However, it is important to note that this product will kill grass, so it should not be applied directly to lawns unless you intend to remove the grass.

The application method is very user-friendly, as it comes in a ready-to-use spray form, eliminating the need for mixing or dealing with drift. You simply spray it on the weeds until they are wet, and they will begin to wilt away. The coverage area is effective for most broadleaf weeds and grasses, making it versatile for use in various landscaping areas such as gardens, flowerbeds, and mulched areas.

One potential drawback is that the product's effectiveness may be diminished in rainy conditions since there's no mention of rainfastness. Additionally, while it is safe for plants in surrounding areas, the vinegar-based formula may not offer long-term moss killing effects compared to some commercial herbicides. This product is particularly suitable for those who prioritize safety and natural ingredients in their weed control solutions.

The Wet & Forget Outdoor Moss, Mold, Mildew, & Algae Stain Remover is an effective solution for removing moss and other stains from various outdoor surfaces. This product is bleach-free and non-acidic, making it safer for plants and pets. The improved nozzle attaches easily to a garden hose and can spray up to 30 feet, providing both a jet tip for targeted cleaning and a fan tip for broader application. It's easy to apply – you just spray the dry surface on a cool day, and there's no need to rinse.

It's essential to ensure no rain is forecasted for 4-5 hours after application for optimal results. The product cleans gradually with exposure to wind and rain, with green stains disappearing in 1-2 weeks and more stubborn stains taking several months. It covers up to 2,000 square feet per bottle, but heavily stained or porous surfaces may require more product. One drawback is the long cleaning time for established stains, which can take up to 12 months to clear completely. Additionally, you need to be mindful of water bodies as the product should be sprayed at least 100 feet away from lakes, ponds, rivers, and streams.

Its longevity of effect means surfaces can stay clean for up to a year or longer, making it a good choice for those who need a low-maintenance solution for outdoor cleaning.

Wet & Forget Outdoor Moss Killer is a ready-to-use liquid cleaner designed to remove moss, mold, mildew, and algae from various outdoor surfaces like concrete, porch steps, and planters. It’s easy to apply with the included trigger sprayer, requiring no scrubbing, rinsing, or pressure washing; you simply spray it on a dry surface on a cool day and let rain and wind do the rest. The product is bleach-free and non-acidic, making it safer for plants and pets, although you should avoid spraying near water bodies and rinse plants before and after use to be cautious. Coverage varies between 60 to 180 square feet per bottle, depending on how porous and stained the surface is.

One thing to keep in mind is that it works gradually—light green stains fade in a week or two, but tougher black or older stains might take several months to disappear. After cleaning, surfaces can stay clear for a year or longer, which is quite convenient. However, it’s important to apply when no rain is expected for a few hours and when temperatures are above freezing to ensure effectiveness.

This product provides a low-effort way to manage moss and similar stains over time without harsh chemicals, though it may not satisfy those seeking fast results due to its gradual action.