Best Fertilizer For Patchy Grass: 7 Options Compared

#1 · Best Overall

1. Scotts Turf Builder Thick'R Lawn

• Weight: 8 oz

Best for: Thin-lawn overseeding in one pass.

Why it ranks #1: Its 3-in-1 blend includes grass seed, fertilizer, and soil improver, directly addressing gaps and thin turf in an overseeding product.

The 3-in-1 blend combines grass seed, fertilizer, and soil improver, letting you address bare gaps, turf color, and root development in one spreader application. It is specifically presented for thin, weak lawns and overseeding, with a Sun & Shade formula for filling in an existing lawn.

Seed supplies grass to fill gaps, while fertilizer supports thicker, greener turf; the soil improver is included to enhance root development. Together, those components make this a single-application approach to overseeding rather than a separate seed-and-feed routine. Apply it with a spreader, and measure the lawn first to estimate how much product you need using the bag label’s coverage guidance. Scotts says results may vary with lawn condition and proper care.

Skip it if you only want to feed established grass without adding seed; this formula combines seed, fertilizer, and soil improver.

Choose it if thin patches call for overseeding plus feeding and soil improvement in one spreader pass. It is a less direct fit when you want fertilizer alone, and results depend on lawn condition and proper care.

Listed on Amazon as: Scotts Turf Builder Thick'R Lawn Sun & Shade, 40 lbs.

#2 · Best for Seeding

2. Simple Lawn Solutions Growth Booster

• Weight: 2 lb
• Form: Liquid

Best for: Liquid boost for lawn repair.

Why it ranks #2: Humic-acid liquid fertilizer is described for new sod, seeding, nutrient deficiency, and lawn repair, making it a strong companion for regrowth.

Humic acid is the defining addition in this growth booster, paired with nitrogen and phosphorus to support vertical and lateral lawn growth. Its ready-to-use hose-end sprayer targets new sod, seeding, nutrient deficiency, and lawn repair, making it a focused option for recovery work.

The formula’s humic acid accompanies nitrogen and phosphorus in a concentrate described for boosting growth and lawn thickness. That makes it relevant when establishing new sod or seed, as well as addressing nutrient deficiency or repairing a lawn. The included ready-to-use hose-end sprayer connects to a hose, then applies the liquid evenly across prepared turf. It is also listed for a broad range of grasses, from Bermuda and St. Augustine to fescue and Kentucky bluegrass.

Skip it if you want a complete 16-4-8 macronutrient blend with seaweed and fish; Simple Lawn Solutions Advanced 16-4-8 provides that formula.

Consider it for lawn repair, seeding, new sod, or a growth boost on one of its listed grass types. Its hose-end application suits prepared turf, but it is not the simplest match for buyers seeking a different nutrient blend.

Listed on Amazon as: Extreme Grass Growth Lawn Booster- Liquid Spray Concentrated Starter Fertilizer with Humic Acid- Any Grass Type- Simple Lawn Solutions (32 oz. w/Sprayer)

#3 · Balanced Liquid Feed

3. Simple Lawn Solutions 16-4-8

• Weight: 2 lb
• Form: Liquid

Best for: Balanced liquid feed for mixed lawns.

Why it ranks #3: Its 16-4-8 NPK formula supplies nitrogen, phosphorus, and potassium, while the ready-to-use hose-end sprayer suits feeding established grass.

Its 16-4-8 NPK blend pairs nitrogen, phosphorus, and potash with seaweed and fish, giving lawn owners a liquid feed aimed at greening and growth. The ready-to-use sprayer and stated compatibility with multiple grass types make hose-end application the central convenience.

The 16-4-8 formula supplies the three listed macronutrients, while seaweed and fish are also included; the product description connects the blend with turf greening, growth, and root vigor. For application, shake the bottle, connect its hose-end sprayer to a water hose, and spray evenly over the lawn. That workflow avoids measuring liquid for a separate sprayer, but it does require access to a hose and even coverage across the treatment area.

Skip it if you need a granular, spreader-applied feeding rather than a liquid treatment that attaches to a water hose.

A practical match for lawn owners seeking a balanced liquid feed across listed grass types, including Bermuda, with hose-end application. Choose another format if your routine requires granules or you cannot connect a sprayer to a hose.

Listed on Amazon as: Advanced 16-4-8 Balanced NPK – Lawn Food Quality Liquid Fertilizer – Spring & Summer Concentrated Spray – Any Grass Type – Simple Lawn Solutions (32 Ounce)

#4 · Best Phosphate-Free

4. Simple Lawn Solutions 15-0-15

• Weight: 2 lb
• Form: Liquid

Best for: Phosphate-free feed for turf vigor.

Why it ranks #4: This phosphate-free 15-0-15 liquid combines nitrogen and potassium with humic, fish, and seaweed ingredients for growth and turf hardiness.

Its phosphate-free 15-0-15 blend combines nitrogen and potash with humic, fish, and seaweed, targeting greening, growth, and turf hardiness. The attached sprayer supports liquid application across a wide range of listed grass types, making it suitable for maintenance or nutrient-deficiency treatment.

Nitrogen and potassium are the core nutrients in the 15-0-15 ratio, while humic, fish, and seaweed are included to support turf vigor. The product is described for both routine lawn maintenance and treating nutrient deficiencies, so buyers can use the same liquid formula for either purpose. Its attached sprayer makes application a hose-end task rather than a spreader routine. Compatibility is listed for grasses including Bermuda, St. Augustine, tall fescue, fine fescue, and Kentucky bluegrass.

Skip it if you want phosphorus included in your lawn fertilizer; this phosphate-free 15-0-15 formula does not provide it.

Consider it for liquid feeding, maintenance, or nutrient-deficiency treatment when a phosphate-free formula suits your lawn needs. Its listed grass compatibility is broad, but buyers specifically seeking phosphorus should choose a different nutrient ratio.

Listed on Amazon as: Superior 15-0-15 Liquid Lawn Fertilizer – Lawn Food for Growth & Green – Nitrogen, Potassium, Humic, Fish & Seaweed – Any Grass Type- Simple Lawn Solutions – All Season- Attached Sprayer (32 Ounce)

#5 · Longest Feed

5. Pennington Full Season Fertilizer

• Weight: 11.2 lb
• Form: Granules

Best for: Season-long granular feeding.

Why it ranks #5: Controlled-release nitrogen feeds for up to four months, and 5% iron supports deep greening; it does not include seed for bare gaps.

Polymer-coated urea releases nitrogen for up to four months, letting one spreader application feed turf through a season. Pennington pairs that controlled release with 5% iron for deep greening and beneficial microorganisms intended to revitalize soil, making it a granular choice for extended care.

The 32-0-5 formula uses polymer-coated urea to release nitrogen gradually for up to four months, reducing the need for repeated feeding during that period. Added iron promotes deep green color, while beneficial microorganisms are included for soil care. Apply the granules with a spreader according to package directions. Coverage depends on bag size, with options listed for up to 4,000 or 12,000 square feet; availability excludes Hawaii and South Dakota.

Skip it if you live in Hawaii or South Dakota, where this product is not available, or need a liquid hose-end application.

A fit for homeowners who prefer granular spreader application and extended feeding, with iron for deep greening. Check the stated state availability and choose the bag coverage option that matches the lawn area.

Listed on Amazon as: Pennington Full Season Lawn Fertilizer 4M 32-0-5 RF 3/11.2Lb

#6

6. Spectracide Lawn Fertilizer

• Form: Liquid

Best for: Fast color with hose-end ease.

Why it ranks #6: Its 30-0-0 liquid formula pairs quick- and slow-release nitrogen and feeds up to 5,000 square feet, but does not supply seed.

Quick-release and slow-release nitrogen work together in this 30-0-0 formula, pairing fast greening with longer-lasting color. The QuickFlip hose-end sprayer requires no mixing, so application is a straightforward connect-and-spray routine for lawns needing a convenient liquid feed.

The two nitrogen release rates serve different timing needs: quick-release nitrogen is intended to green the lawn fast, while slow-release nitrogen supports lasting color. The formula also promotes thick growth and strong, deep roots. For application, shake the bottle, connect the QuickFlip sprayer to a hose, and spray without mixing. One 32-ounce bottle feeds up to 5,000 square feet. State and local fertilizer rules apply, including listed seasonal restrictions in some locations.

Skip it if you cannot apply nitrogen under your local seasonal rules; this formula has stated restrictions in New York and north Florida.

Choose it when quick color and a no-mixing hose-end routine matter, and the lawn area falls within the bottle’s stated coverage. Check local fertilizer ordinances before applying, since seasonal restrictions can rule it out.

Listed on Amazon as: Spectracide Lawn Fertilizer 30-0-0, 2-in-1 Formula 32 Oz, 3 Pack

#7

7. Scotts Liquid Green Max

• Weight: 8.32 oz
• Form: Liquid

Best for: Quick liquid greening for hose users.

Why it ranks #7: The 29-0-0 liquid feed with iron is designed for fast greening, but the listing focuses on color rather than filling bare patches.

A 29-0-0 nitrogen formula boosted with iron delivers deep greening, with Scotts stating results in as little as three days. The hose-connected bottle feeds a 2,000-square-foot lawn in 10 minutes, giving time-conscious owners a simple feed-while-you-water application.

Nitrogen supplies the lawn food, while the added iron supports the product’s deep-greening purpose. Scotts says the 32-fluid-ounce bottle covers 2,000 square feet in 10 minutes when connected to a hose, which makes it a quick option for a lawn within that area. The product is listed for any grass type and should be applied while turf is actively growing. Its reusable spray applicator can be used with separate refill bottles, sold separately.

Skip it if you need a single bottle to cover more than 2,000 square feet; the stated coverage is 2,000 square feet per 32-fluid-ounce bottle.

A useful match for owners seeking fast liquid greening on actively growing turf, especially a lawn within the stated 2,000-square-foot coverage. Factor in the hose connection and separate refill bottles if you plan repeated applications.

Listed on Amazon as: Scotts Liquid Green Max Lawn Food, 32 fl. oz.