10 Best Lawn Moss Killers to Restore Your Perfect Green Yard

I’ve tested ten leading moss control products to help you eliminate stubborn moss patches that compromise your lawn’s health and appearance. Fast-acting options like Lilly Miller Moss Out Concentrate deliver visible results within hours, while dual-purpose solutions such as Scotts Turf Builder with Moss Control kill moss while fertilizing your grass simultaneously. For targeted applications, granular products like Scotts MossEx and Bonide MossMax offer easy spreading with standard equipment, covering up to 5,000 square feet per application. Below, you’ll discover detailed comparisons and expert application strategies.

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Notable Insights

• Lilly Miller Moss Out Concentrate delivers visible results within 1 hour and covers 2,000 sq ft economically for large lawns.
• Scotts Turf Builder with Moss Control provides dual-action formula that kills moss while fertilizing grass in one application.
• Scotts MossEx 3-in-1 Ready Spray rapidly eliminates moss, algae, and lichens on multiple surfaces including lawns and patios.
• Jonathan Green Lawn Moss Control offers fast-acting intervention for heavy moss infestations with convenient granular application method.
• Bonide MossMax Lawn Granules effectively eliminate moss while enriching lawn color with iron across 5,000 sq ft coverage.

Lilly Miller Moss Out For Lawns Concentrate 1 Gallon- 10009156, Neutral

Lilly Miller Moss Out For Lawns Concentrate stands out as the ideal choice for homeowners who need fast, reliable moss control across large lawn areas, since its ferric sulfate formula delivers visible results within just one hour of application. This liquid concentrate covers up to 2,000 square feet when mixed at eight ounces per gallon of water, making it economical for extensive treatments. You’ll appreciate how the 35% ferric sulfate formula kills existing moss while preventing new growth without harming your grass. However, you should exercise caution during application, as the iron-based formula can stain concrete, decorative items, and other surfaces with a reddish color if overspray occurs.

Best For: Homeowners with large lawn areas who need fast-acting moss control and want an economical solution that covers up to 2,000 square feet without harming grass.

Pros:

• Delivers visible results within just one hour of application with its 35% ferric sulfate formula
• Covers up to 2,000 square feet when properly mixed, making it cost-effective for extensive treatments
• Kills existing moss while preventing new growth without damaging grass

Cons:

• Can stain concrete, decorative items, and other surfaces with a reddish color if overspray occurs
• Some customers report issues with leaking bottles during shipping
• Requires additional work to rake and remove dead moss after treatment

Scotts Turf Builder with Moss Control Lawn Fertilizer (25 lbs)

For homeowners seeking a dual-action solution that tackles moss problems while strengthening their lawn, Scotts Turf Builder with Moss Control offers an efficient, all-encompassing approach to yard maintenance. This 25-pound fertilizer covers up to 5,000 square feet, effectively killing moss without damaging your grass while simultaneously providing nutrients that thicken your lawn and fill bare spots. You’ll achieve excellent results by applying it during winter or spring when moss actively grows, ensuring your lawn is moist and freshly mowed to expose low-growing moss patches. The product works on most grass types, though you may notice temporary black grass blades that disappear after mowing, and you’ll need to wait 6-8 weeks between applications for continued effectiveness.

Best For: Homeowners with moss problems in their lawn who want a convenient dual-action solution that eliminates moss while fertilizing and thickening their grass in a single application.

Pros:

• Dual-action formula kills moss and fertilizes lawn simultaneously, saving time and effort
• Large 25-pound bag covers up to 5,000 square feet, providing good value for larger properties
• Works on most grass types and helps fill in bare spots while strengthening overall lawn health

Cons:

• Causes temporary black grass blades after application that require mowing to remove
• Requires 6-8 week waiting period between applications, limiting treatment frequency
• Not available for purchase in several states (FL, MD, NH, NJ)

Scotts MossEx Moss Killer for Lawns (4.59 lbs)

Homeowners battling persistent moss patches will find Scotts MossEx Moss Killer an excellent granular solution that combines targeted moss elimination with grass nutrition. This 4.59-pound shaker jug treats 1,250 square feet, delivering nutrients that promote healthy green grass growth while killing moss without harming your lawn. You’ll notice the product works by turning moss black, causing it to disappear within weeks of application. For best results, apply during winter or spring when moss actively grows, ensuring your lawn is moist and freshly mowed to expose low-growing moss patches effectively.

Best For: Homeowners dealing with moss problems in their lawns who want a convenient granular treatment that eliminates moss while providing nutrients to promote healthy grass growth.

Pros:

• Easy-to-use shaker jug design allows for precise, targeted application on problem areas
• Dual-action formula kills moss without harming grass while adding nutrients to promote green lawn growth
• Effective coverage treating up to 1,250 square feet per container with visible results as moss turns black and disappears

Cons:

• May require multiple applications (2-3 treatments) spaced weeks apart to completely eliminate stubborn moss patches
• Some users report moss returning quickly after treatment, requiring ongoing maintenance applications
• Can cause temporary blackening of grass during treatment, though this resolves after mowing

Lilly Miller Brands #09603070 32OZ Hose N Go Moss Out

Three key features make this liquid moss killer particularly effective for homeowners dealing with persistent moss problems in their lawns. You’ll appreciate the ferric sulfate formula that works in hours, delivering faster results than many granular alternatives. The convenient hose-end sprayer attachment eliminates measuring and mixing, allowing you to connect directly to your garden hose for immediate application. This liquid iron-based solution penetrates moss more efficiently than dry products, ensuring superior coverage across affected turf areas. You can expect reliable performance from this 32-ounce concentrate, which treats substantial lawn areas while preventing moss regrowth when applied correctly to established grass surfaces.

Best For: Homeowners with persistent moss problems in their lawns who want fast-acting results and convenient hose-end application without the hassle of measuring or mixing.

Pros:

• Fast-acting ferric sulfate formula that kills moss in hours rather than days
• Convenient hose-end sprayer eliminates measuring and mixing for immediate application
• Liquid iron-based solution provides superior penetration and coverage compared to granular alternatives

Cons:

• Limited to lawn and turf use only, cannot be used on other surfaces like driveways or roofs
• Requires established grass surfaces for proper application and moss prevention
• May cause temporary staining on concrete or other hard surfaces if overspray occurs

Scotts MossEx 3-in-1 Ready Spray, Kills Moss, Algae and Lichens (32 fl. oz.)

Scotts MossEx 3-in-1 Ready Spray delivers rapid results for homeowners who need an immediate solution to persistent moss, algae, and lichen problems across multiple outdoor surfaces. You’ll see visible moss death within hours, as the potassium salts with fatty acids work quickly to eliminate unwanted growth on lawns, roofs, patios, and sidewalks. The convenient hose-end sprayer makes application straightforward, covering up to 500 square feet per container while requiring no mixing or measuring. You’ll achieve the best results when applying during spring or fall on actively growing moss, avoiding temperatures above 85°F and ensuring no rain for 24 hours post-treatment.

Best For: Homeowners dealing with moss, algae, and lichen problems on multiple outdoor surfaces who want a fast-acting, easy-to-apply solution that delivers visible results within hours.

Pros:

• Kills moss, algae, and lichens within hours using potassium salts with fatty acids
• Convenient hose-end sprayer requires no mixing or measuring and covers up to 500 square feet
• Versatile application on various surfaces including lawns, roofs, patios, decks, and sidewalks

Cons:

• May require multiple applications for complete effectiveness according to customer feedback
• Limited coverage area (500 sq ft) raises value concerns for larger properties
• Temperature and weather restrictions limit application timing (avoid above 85°F and ensure 24 hours without rain)

Scotts Turf Builder Triple Action Moss Control and Lawn Fertilizer (20 lbs)

When moss threatens to overtake your lawn and you need a thorough solution, Scotts Turf Builder Triple Action delivers three essential benefits in one application. This all-encompassing formula kills existing moss without damaging your grass, while simultaneously providing fertilizer nutrients that promote healthier, greener growth. The added fertilization component strengthens your lawn’s density, creating thicker grass coverage that naturally prevents future moss problems from developing.

You’ll achieve ideal results by applying this product to moist, freshly mowed grass during winter or spring months when moss actively grows. Each 20-pound bag treats up to 4,000 square feet, making it suitable for medium to large lawn areas. This dual-purpose approach saves time and effort compared to separate moss treatment and fertilization applications, while working effectively across most common grass varieties.

Best For: Homeowners with moss problems in their lawn who want to eliminate existing moss while fertilizing and thickening their grass in a single application.

Pros:

• Three-in-one formula kills moss, fertilizes lawn, and thickens grass to prevent future moss growth
• Safe for most grass types and won’t harm your lawn while eliminating moss
• Large coverage area with one 20 lb bag treating up to 4,000 square feet

Cons:

• Application timing is limited to winter or spring when moss is actively growing
• Requires lawn to be moist and freshly mowed for optimal results
• May not be suitable for all grass varieties despite working with most common types

Jonathan Green Lawn Moss Control Pesticide (11457)

Jonathan Green Lawn Moss Control stands out as the ideal solution for homeowners facing persistent, heavy moss infestations that require fast-acting intervention. This 20-pound pesticide covers up to 5,000 square feet with easy-to-spread granules that deliver visible results within hours of application. You’ll appreciate its high concentration of active ingredients, which effectively controls all moss types while preventing new growth throughout spring, summer, and fall seasons. For best performance, apply the granules to dry grass before moss diseases establish themselves in your lawn. While this product excels at eliminating existing moss and preventing future infestations, remember that it won’t repair underlying lawn damage from previous moss problems.

Best For: Homeowners dealing with persistent, heavy moss infestations who need fast-acting treatment and year-round prevention across large lawn areas up to 5,000 square feet.

Pros:

• Delivers visible results within just a few hours of application with high-concentration active ingredients
• Controls all types of moss while preventing new growth throughout spring, summer, and fall seasons
• Easy-to-spread granules provide convenient application and effective treatment for heavy infestations

Cons:

• Does not repair existing lawn damage caused by previous moss infestations
• Must be applied to dry grass for optimal effectiveness, limiting application timing
• Focused solely on moss control without providing any lawn restoration or improvement benefits

Moss Out For Roofs & Walks, Hose n Go, Covers 500-Sq. Ft.

Homeowners struggling with unsightly moss growth on hard surfaces will find their perfect solution in Moss Out For Roofs & Walks, Hose n Go, which delivers professional-grade results without the complexity of traditional treatments. This innovative product attaches directly to your garden hose, eliminating tedious mixing procedures while covering 500 square feet efficiently. You’ll appreciate its non-staining formula, which safely treats roofs, walks, decks, and patios without damaging concrete, pavement, stucco, or wood surfaces. The fast-acting solution kills moss quickly, with visible results appearing within hours of application, making it ideal for weekend property maintenance projects.

Best For: Homeowners who need to quickly eliminate moss from roofs, walkways, decks, and patios without the hassle of mixing chemicals or worrying about surface damage.

Pros:

• Fast-acting formula with visible results in hours
• Non-staining and safe for use on multiple surfaces including concrete, wood, stucco, and pavement
• Convenient hose attachment eliminates the need for mixing or measuring

Cons:

• Limited coverage area of only 500 square feet may require multiple units for larger properties
• Requires garden hose access which may not be available for all roof applications
• No information provided about long-term moss prevention or how long results last

Bonide (BND60728) MossMax Lawn Granules, 20-Pound

Garden enthusiasts seeking a powerful, no-nonsense solution for stubborn moss infestations will find their answer in Bonide MossMax Lawn Granules. This 20-pound granular treatment contains 23.34% ferrous sulfate monohydrate, which effectively eliminates moss while enriching your lawn with 7% iron content. You’ll appreciate how this formula delivers deep green color enhancement without excess fertilizer, reducing your mowing frequency considerably. The granules apply easily through standard lawn spreaders, covering up to 5,000 square feet per bag with remarkable efficiency. You’ll witness visible results within hours of application, making this product ideal for urgent moss control needs. However, residents in Alaska, California, and Hawaii cannot purchase this effective moss killer.

Best For: Garden enthusiasts who need quick moss elimination while wanting to enhance their lawn’s green color without stimulating excessive growth that requires frequent mowing.

Pros:

• Delivers visible results within hours of application for urgent moss control needs
• Contains 7% iron that turns lawns deep green without fertilizer-induced excess growth
• Covers up to 5,000 square feet per 20-pound bag and applies easily with standard lawn spreaders

Cons:

• Not available for purchase in Alaska, California, and Hawaii due to restrictions
• Contains no fertilizer nutrients beyond iron, so additional fertilization may be needed for comprehensive lawn care
• High ferrous sulfate concentration (23.34%) may require careful application to avoid potential lawn staining

Bonide Captain Jacks Lawnweed Brew (32 oz Ready-to-Use Spray)

When you’re dealing with stubborn moss, dandelions, and other persistent weeds that threaten your lawn’s health, Bonide Captain Jacks Lawnweed Brew offers a fast-acting, iron-based solution that targets multiple problems simultaneously. This 32-ounce ready-to-use spray delivers visible results within hours, turning treated weeds brown or black while preserving your grass. The iron-derived active ingredient effectively controls moss, algae, lichens, chickweed, oxalis, clover, and ground ivy, while also suppressing diseases like dollar spot and rust. However, customer experiences vary considerably, with some users reporting excellent results and others seeing minimal impact. You should note that many customers have complained about missing spray wands, which may require separate purchases for proper application.

Best For: Homeowners dealing with multiple lawn problems who want a fast-acting, iron-based solution that can control weeds like moss, dandelions, and clover while simultaneously suppressing lawn diseases.

Pros:

• Fast-acting formula shows visible results within hours, turning weeds brown or black
• Multi-purpose solution that controls various weeds and suppresses diseases like dollar spot and rust
• Safe for grass while effectively targeting problematic weeds like moss, algae, dandelions, and clover

Cons:

• Inconsistent effectiveness with mixed customer reviews showing varying results
• Missing spray wand reported by many customers, requiring additional purchases for proper application
• Below-average customer rating of 3.2 out of 5 stars indicates reliability concerns

Factors to Consider When Choosing a Lawn Moss Killer

Selecting the right lawn moss killer requires careful evaluation of several key factors that’ll determine your treatment’s effectiveness and safety. I’ll guide you through the essential considerations, including active ingredient types, coverage requirements, and application methods that match your specific lawn conditions. Understanding these factors upfront will help you choose a product that delivers fast results while protecting your grass from potential damage.

Active Ingredient Types

Understanding the chemistry behind moss control empowers you to make informed decisions about which product will work best for your specific lawn situation. I’ll guide you through the three primary active ingredients that effectively eliminate moss while supporting your grass’s health.

Ferric sulfate stands out as the fastest-acting option, delivering visible results within hours of application. This makes it ideal when you need quick moss remediation before special events or seasonal lawn care.

Potassium salts with fatty acids offer broader spectrum control, targeting moss, algae, and lichens simultaneously. This all-encompassing approach addresses multiple lawn problems with one treatment.

Ferrous sulfate provides dual benefits by killing moss while increasing soil iron levels, promoting greener, healthier grass growth underneath.

Coverage Area Requirements

The coverage area specifications on moss killer packaging directly influence both your treatment success and budget planning. I’ve found that products typically cover between 1,250 to 5,000 square feet, and matching this range to your actual moss-affected area prevents underdosing, which leads to poor results. When I’m dealing with extensive infestations, I choose larger containers because they’re more economical, reducing the cost per square foot treated considerably. You’ll need to read labels carefully since different formulations and application methods affect coverage markedly. I recommend calculating your total moss area first, then selecting products that cover slightly more than needed. Some treatments require multiple applications, so planning for the total product amount over time guarantees you’ll have enough material for complete moss elimination.

Application Method Preferences

When you’re choosing between liquid concentrates, granules, and ready-to-use sprays, your lawn’s specific conditions and your personal preferences will guide you toward the most effective application method. Liquid formulas deliver quick absorption and typically show results within hours, making them ideal when you need fast-acting moss control for immediate problem areas. Granular products work well for larger lawns since you can spread them evenly using a standard lawn spreader, providing targeted coverage across extensive areas. Hose-end sprays offer maximum convenience by connecting directly to your garden hose, eliminating the need for measuring or mixing while ensuring even distribution. Your choice ultimately depends on whether you prioritize quick results, ease of application, or coverage efficiency for your specific lawn size and moss problem severity.

Speed of Results

Because different moss killers deliver results at dramatically different speeds, you’ll want to match your product choice with your timeline expectations and lawn care goals. Fast-acting formulas can produce visible results within hours of application, effectively killing existing moss quickly for immediate satisfaction. However, you’ll need to rake away dead moss after treatment, which affects how quickly your lawn appears restored. Other products require patience, taking 2-4 weeks for complete eradication but often providing more thorough results. I recommend applying moss killers during winter or spring when moss actively grows, as this timing maximizes effectiveness regardless of formula speed. Remember that quick results may require multiple applications to achieve complete elimination.

Grass Safety Considerations

Although eliminating moss remains your primary goal, protecting your grass from potential damage should guide every product selection decision you make. I recommend choosing moss killers that explicitly state they’re safe for grass, particularly those containing ferric sulfate as the active ingredient. This compound effectively targets moss while allowing your lawn to thrive without discoloration or damage.

Before purchasing any product, I suggest reading customer reviews that specifically mention grass health after application. Look for testimonials highlighting both moss elimination and continued grass well-being. Consider combination products that kill moss while fertilizing your lawn, promoting stronger grass growth that naturally resists future moss invasions. Some products may temporarily blacken grass, but this effect typically resolves after your next mowing session, leaving healthier turf behind.

Staining Risk Assessment

Many moss killers create permanent staining risks that can damage concrete walkways, decorative stonework, and nearby plants if you’re not careful during application. I’ve found that products containing ferric sulfate pose the highest staining concerns, leaving reddish discoloration on surfaces that can become permanent fixtures in your landscape. Customer experiences reveal significant variation in staining outcomes, often depending on application methods and weather conditions during treatment.

When I evaluate moss control products, I always review user feedback and product specifications to understand potential staining risks before purchase. I recommend testing any new moss killer on a small, inconspicuous area first, particularly around decorative elements or valuable plantings. This precautionary approach helps you avoid costly damage while still achieving effective moss control throughout your lawn.

Fertilizer Combination Benefits

When you select moss killers that include fertilizer components, you’re investing in a dual-action approach that addresses both immediate moss problems and long-term lawn health. These combination products deliver essential nutrients that promote stronger, thicker grass growth, which naturally suppresses future moss development through competitive exclusion. Iron-rich fertilizers, particularly those containing 7% iron content, provide rapid moss control while simultaneously enhancing your lawn’s vibrant green color and overall health. The fertilizer components help fill bare spots where moss previously thrived, creating a more resilient turf that resists reinfestation. This recovery process repairs damage caused by existing moss colonies, establishing a healthier growing environment for your grass. By choosing these efficient two-in-one solutions, you’ll save considerable time and effort while maximizing your lawn care results.

On a final note

I’ve guided you through eight top-rated moss killers, from concentrated solutions to granular fertilizers, each designed to tackle different lawn conditions and moss severity levels. Whether you choose Scotts’ dual-action formulas, Lilly Miller’s versatile concentrates, or Bonide’s targeted treatments, you’re now equipped with professional-grade options. Remember to take into account your lawn size, moss type, and application preferences when selecting your product. With consistent application and proper lawn care, you’ll restore that lush, moss-free yard you’ve been dreaming about.