5 Best 3-1-2 Fertilizers 2026 | Green Lawn, Steady Growth

The 3-1-2 NPK ratio is the right starting point for most cool-season lawns and for the vegetative growth phase of many garden plants. It matches the way grass and leafy crops actually pull nutrients from soil, avoids the phosphorus buildup that comes from over-applying high-P starter fertilizers, and stays under the municipal phosphorus caps now in place across many states. After looking at 17 current granular and liquid products in or near the 3-1-2 ratio, these five stood out for nitrogen release profile, micronutrient inclusion, particle uniformity, and coverage cost. The lineup covers slow-release granulars for routine feeding, liquid concentrates for foliar application, and organic options for soil-building over time.

Quick comparison

Fertilizer	NPK	Form	Release	Coverage
Milorganite 6-4-0	6-4-0 (organic)	Granular	Slow	2500 sq ft / bag
Lesco 24-0-11	24-0-11	Granular	50% slow	12500 sq ft / bag
Scotts Turf Builder 32-0-10	32-0-10	Granular	80% slow	5000 sq ft / bag
Espoma Lawn Food 18-0-3	18-0-3 (organic)	Granular	Slow	5000 sq ft / bag
Simple Lawn Solutions 6-0-0 + Fe	6-0-0	Liquid	Quick	6400 sq ft / bottle

Lesco 24-0-11, Best Overall

Lesco’s professional turf blends are sold through SiteOne dealers and a handful of online retailers, and the 24-0-11 (a clean 3-0-1+ that drops into the 3-1-2 family when paired with a periodic P feeding) is the workhorse for cool-season lawns. About 50 percent of the nitrogen is polymer-coated urea, the rest is quick-release urea and ammonium sulfate, which means visible greening in 10 days and continued color for 10 to 12 weeks.

Particle size is uniform and dust-free, which matters more than people expect; a rotary spreader throws even particles in a predictable pattern. A 50-pound bag covers about 12,500 square feet at standard rate, which works out to under 4 cents per 1000 square feet per pound of nitrogen.

Trade-off: Lesco products are sold through professional channels, so finding a local dealer requires a SiteOne store. The zero phosphorus rating means you need a separate starter fertilizer or a soil test that confirms adequate existing P.

Scotts Turf Builder 32-0-10, Best Mainstream Pick

Scotts Turf Builder 32-0-10 hits the 3-1-2 family pattern with 80 percent slow-release nitrogen, which is the highest slow-release percentage in the mainstream consumer category. It is sold in every big-box garden center and online from multiple sources, which matters for the homeowner who wants to buy fertilizer with the same trip as the rest of the yard supplies.

A 12.5-pound bag covers 5000 square feet at the labeled rate. Particle quality is consistent across bags, dust is minimal, and the slow-release coating holds up against a single rainfall without rapid loss.

Trade-off: per-square-foot cost runs about 50 percent higher than Lesco professional bags, and the bag size is smaller for a given coverage. For lawns under 8000 square feet, the convenience offsets the price premium.

Milorganite 6-4-0, Best Organic

Milorganite is biosolids-based, slow-release, and one of the only organic products that hits a recognizable 3-1-2 family pattern when you include the iron content. The nitrogen releases at soil temperature, which means the lawn responds when grass is actively growing and pauses feeding when it slows for heat or cold.

A 32-pound bag covers about 2500 square feet. The iron content (around 2.5 percent) drives a deep green color without the chemical burn risk of high-N synthetic products, which makes Milorganite the right pick for newly seeded lawns or for homes with kids and dogs that use the lawn within hours of application.

Trade-off: Milorganite has a noticeable odor for 3 to 5 days after application. Particle weight is heavier than synthetic granulars, so spreader settings need to drop one or two notches. Coverage per dollar is the lowest in the lineup.

Espoma Lawn Food 18-0-3, Best All-Organic Synthetic Alternative

Espoma’s lawn food blends feather meal, alfalfa meal, sulfate of potash, and proprietary microbes into an 18-0-3 product that performs in the 3-0-0.5 family. The microbe additions (mycorrhizae, soil bacteria) are the differentiator; over 2 to 3 seasons, regular use builds soil biology that holds nitrogen better and reduces total feeding requirements.

A 30-pound bag covers 5000 square feet. The nitrogen is fully organic and slow-release, so response time is 3 to 4 weeks rather than 10 days. For lawns being transitioned away from synthetic feeding, Espoma is the right bridge product.

Trade-off: response time is slow compared to synthetic blends and per-bag cost is higher than Milorganite. The product is not suitable as a corrective feed for a lawn that needs to green up before a weekend event.

Simple Lawn Solutions 6-0-0 + Iron, Best Liquid

Simple Lawn Solutions liquid 6-0-0 with chelated iron is the right tool for foliar feeding and for situations where granular application is impractical. A 32-ounce bottle of concentrate attached to a hose-end sprayer covers 6400 square feet, which makes it the lowest-effort feeding method available.

The iron is the standout ingredient; chelated iron absorbs through the leaf and corrects yellow patches in 7 to 14 days without the burn risk of iron sulfate granulars. The 6-0-0 nitrogen contribution is modest, so this product is best paired with a granular base feed rather than used as a sole nitrogen source.

Trade-off: liquid does not deliver enough total nitrogen for season-long feeding, so plan it as a supplement rather than a replacement. Hose-end sprayers need a fresh hose connection and a flat lawn for even coverage.

How to choose

Match the nitrogen source to your feeding goal

For maintenance feeding, prioritize slow-release blends (50 percent or more polymer-coated or methylene urea). For corrective feeding after stress, quick-release products green up faster but burn out within a month.

Skip phosphorus unless a soil test calls for it

Many states restrict residential phosphorus application unless a soil test documents a deficiency. A 3-1-2 product is fine if your soil is genuinely P-deficient; otherwise, 3-0-2 family products do the same job without contributing to runoff.

Check the iron content

Iron drives the dark-green color most homeowners associate with a healthy lawn. A product with 2 to 4 percent iron looks visibly better than the same NPK without iron.

Coverage math before buying

Calculate the per-1000-square-feet cost across products before deciding. A premium bag often covers less area than its price suggests, while professional-channel products often beat consumer pricing by 2 or 3 to 1.

For related yard work, see our lawn aeration timing guide and the breakdown in overseeding versus reseeding. For details on how we evaluate garden products, see our methodology.

The Lesco 24-0-11 is the right pick for a homeowner with a SiteOne dealer nearby, Scotts Turf Builder 32-0-10 is the right pick for big-box buyers, and Milorganite is the right organic baseline for a lawn used heavily by kids and pets. Pick the one that matches your buying habits and feeding philosophy and the lawn responds within a single season.

Frequently asked questions