7 Best Spray Fertilizer For Lawns | Skip the Spread, Spray

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A half-gallon jug that feeds a third of an acre while staying affordable.

Covering 8,000 sq. ft. from a single 64-ounce bottle, this spray fertilizer gives you more turf per dollar than almost any competitor — buyers report it “goes on brown but after you water your lawn the product soaks into the ground and your grass turns green within a few days.” The 6-0-0 NPK ratio (nitrogen, no phosphorus, no potassium) is a straight greens-up formula, boosted further by humic acid (a soil-enriching organic compound that helps roots absorb nutrients).

Unlike the Simple Lawn Solutions 0-0-25, which is a niche potassium-only bottle at 32 fluid ounces covering just 3,200 sq. ft., the NitroHume delivers 64 fluid ounces and double the coverage for a similar price. The 1:128 mixing ratio (that is 1 part fertilizer to 128 parts water) is easy to use with a hose-end sprayer. It works on bermuda grass, St. Augustine, and zoysia, though the lack of slow-release tech means you should reapply every 1–2 months for sustained color.

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One jug that packs nitrogen, iron, humic acid, sea kelp, and potassium.

This is the all-in-one heavy hitter for anyone who wants deep green color plus root strength and stress resistance — all from one bottle. The 7-in-1 formula delivers 19% nitrogen for rapid growth, 2.5% iron for color depth, plus humic acid and sea kelp for soil health and drought resilience. The 1-gallon (128 fluid ounce) bottle covers 16,000 sq. ft., matching the NitroHume on coverage but with a far more complex nutrient profile. Owners mention “the really quick darkening is just staining,” but the mixture of nutrients is “elite” and hard to find elsewhere in one product.

At 9.5 pounds, this bottle is noticeably heavier than the lighter 32-ounce competitors like the Petramax 28-0-0, and the mixing ratio is 7:1 (7 parts water to 1 part fertilizer), so you will go through the concentrate faster with a hose-end sprayer. Still, the combination of quick results (7–14 days per the maker) and steady feeding makes it a favorite for serious lawn enthusiasts who want professional-grade results without buying four separate bottles.

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An ultra-high-nitrogen formula that turns yellow grass dark green fast.

If your lawn is pale and nitrogen-deficient, the 28-0-0 NPK ratio is the strongest nitrogen jolt on this list. The clever part is the 2-in-1 release tech: 70% is quick-release nitrogen for visible greening in days, and 30% is slow-release nitrogen so the grass keeps feeding between applications. That makes it far less risky than a pure quick-release formula like the NitroHume 6-0-0. One reviewer noted “my lawn has never been so green” after using it, and it works on both warm- and cold-season grass types.

The mixing ratio is simple — 5 oz per gallon for maintenance or 10 oz per gallon to fix nitrogen deficiency. At maintenance strength, a 32-ounce bottle treats up to 12,800 sq. ft., which is impressive for such a small bottle. The catch is you need your own sprayer (the maker recommends a PetraTools sprayer), as this is a concentrate that does not include a hose-end sprayer like the Simple Lawn Solutions bottle does.

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Equal parts nitrogen, phosphorus, and potassium for feeding everything from turf to tomatoes.

Most spray fertilizers on this list skew heavily toward nitrogen (like the 28-0-0 Petramax), but the Covington 10-10-10 is a true balanced formula. That means it feeds the grass blades (nitrogen), supports root growth (phosphorus), and strengthens the lawn against stress (potassium) all at once. Customers note it “works great” for lawns, flowers, and vegetable gardens alike, calling it “very versatile.” The low salt index (a measure of how much salt is in the fertilizer, which can burn roots at high levels) makes it gentler on soil.

The mixing ratio is 1:200 (very diluted), so a 32-ounce bottle goes a long way when used with a hose-end or pump sprayer. It is not the fastest greening option — the 10-10-10 is designed for steady, even growth rather than a dramatic 3-day color change like the Scotts Liquid Green Max promises. But if you want one bottle for your entire yard, garden beds, and houseplants, this is your pick.

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Zero nitrogen, heavy potassium — designed for summer stress, not spring green-up.

This is the specialist on the list. While most spray fertilizers pump nitrogen for green growth, the 0-0-25 formula skips nitrogen entirely and delivers a high dose of potassium. Potassium helps turf grass tolerate heat, drought, and cold, making this ideal for late-summer application when your lawn is under stress. Reviewers point out it “produced very green lawn without excessive growth requiring more frequent mowing,” which is the key benefit — it strengthens the grass you already have rather than forcing fast blade growth.

At 32 fluid ounces covering just 3,200 sq. ft., it is one of the smaller coverage options (the NitroHume covers more than double at 64 ounces for 8,000 sq. ft.). But it includes a ready-to-use hose-end sprayer, so you do not need extra equipment. One buyer mentioned their first unit was defective (sprayed only water), but the company sent a replacement immediately. It is a niche tool — perfect for fall preparation, not for a quick green boost in spring.

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Certified organic ingredients that are kid and pet friendly from the first spray.

If you have children or pets who play on the lawn, the FOOP Organic Liquid Lawn & Turf Food is the only certified organic option here. It is made from fish manure, fish emulsion, sea kelp, volcanic ash, and mycorrhizal fungi (beneficial fungi that form a symbiotic relationship with plant roots to improve water and nutrient absorption). The 32-ounce bottle covers up to 5,000 sq. ft. at a 1:32 mixing ratio, and shoppers say “plants love it” with a mild smell that does not linger.

It is slower-acting than synthetic nitrogen fertilizers like the Petramax 28-0-0 — organic nutrients need soil microbes to break them down before grass can absorb them. But the broad nutrient spectrum (including calcium, magnesium, and silica) means healthier soil over the long term. The “mild smell” mentioned by buyers is worth noting: fish-based organic fertilizers can have a noticeable odor, though most say it dissipates quickly after watering.

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A familiar brand with a 2-in-1 iron formula — but coverage is tight.

Scotts is a household name in lawn care, and the Liquid Green Max is a straightforward 2-in-1 fertilizer and iron supplement. It claims to green your lawn in 3 days and covers 2,000 sq. ft. from the 32-ounce bottle. The included hose-end sprayer makes application as simple as connecting, pointing, and spraying — no mixing required. Buyers report it “works pretty good” overall.

However, there is a real caution here. One owner reported that when applied to an aerated, reseeded lawn, it “caused increasing brown spots within a week.” This suggests the formula may be too strong for delicate or newly overseeded grass, or the iron concentration can stain. Also, at 2,000 sq. ft. per bottle, coverage is the smallest on this list — the NitroHume covers 8 times more in one bottle. If you have a large lawn, you will go through multiple bottles per application.