The 10 Best Lawn Fertilizers

For most established lawns, Scotts Turf Builder Lawn Food is the simple, low-cost place to start. It's mostly nitrogen with a little potassium and iron, and it skips phosphorus, which grown lawns rarely need. It works on any grass type, on a wet or dry lawn, in spring, summer or fall. A small bag feeds an ordinary yard once. Most of its nitrogen acts fast, so a heavy hand or a heat wave can scorch grass.

Made from heat-dried microbes at a Milwaukee sewage plant, Milorganite feeds for about two months and won't burn grass in summer heat. It doesn't need watering in, and its iron deepens the color. In Bob Vila's lawn trial it gave thicker, greener grass after three or four weeks, not overnight. This link is the small bag, sized for touch-ups. Because it's made from biosolids, some buyers will want to read the maker's own PFAS test results first.

Built for people chasing a golf-course look, The Andersons PGF Complete uses fine granules that spread more evenly, so a missed pass leaves fewer stripes. It blends fast and slow nitrogen to feed for up to two months, with iron and humic acid, a soil conditioner. Its balance of nitrogen, phosphorus and potassium suits routine feeding on most grasses. It does carry some phosphorus, which a few states limit, and it isn't sold in California.

Late summer and fall are the main feeding seasons for cool-season grass, and GreenView Fairway Formula Fall is made for that window. It's rich in nitrogen and potassium, which helps roots build reserves for winter, and it has no phosphorus. Most of the nitrogen releases slowly, so one pass keeps working for up to three months. A bag goes a long way on a big yard. It's a fall feeding only, so spring needs another bag.

Families with kids and dogs can start with Safer Brand Lawn Restore, a naturally derived food the maker says is fine to play on right after spreading. It has no phosphorus and won't burn grass, so a heavy hand does little harm. This is the old Ringer Lawn Restore under a new name. Expect slow, modest gains rather than a quick color change, and plan on several feedings a year to see a clear difference.

Organic gardeners who trust the brand's plant foods will recognize Espoma All Season Lawn Food. It's an all-nitrogen feed with added soil microbes and no sludge or fillers, and it won't burn. You can spread it up to four times a year in any season. Since it carries no potassium or phosphorus, it won't fix a soil test that shows those running low. Espoma's page gives no advice on when kids and pets can return, so check the bag.

Shoppers who want an organic feed from a familiar name can turn to Scotts Natural Lawn Food, which is listed for organic use. It feeds any grass type and can go down before or after seeding. Scotts says kids and pets can walk on the lawn right after spreading. Results build slowly, with a thicker lawn over several weeks rather than a quick green-up, and the bag is heavy to lug for the ground it covers.

New seed and fresh sod are the one time a lawn wants plenty of phosphorus, and Scotts Turf Builder Starter supplies it to push quick root growth. Spread it right before or after seeding or laying sod, then water. It suits every grass type. Skip it on an established lawn, since extra phosphorus there can wash into streams and many towns limit its use. This big bag covers far more ground than most yards need at once.

If pushing a spreader sounds like a chore, Simple Lawn Solutions 16-4-8 comes ready to hook to a garden hose and spray. The liquid acts quickly and adds seaweed and fish for trace nutrients, and the maker lists it for warm- and cool-season grasses alike. A jug covers a modest yard, so big lawns go through several and need repeat feedings every few weeks. Go easy near driveways and storm drains, where spray can run off.

Big yards get the most from Yard Mastery Flagship, since one bag covers about a third of an acre. Its nitrogen releases slowly, so color comes on steadily without surges of growth, and added iron gives grass a deep blue-green tone. There's no phosphorus. The bag prints spreader settings for many common spreaders, which saves guesswork. The blend includes a biosolid ingredient, which some buyers prefer to avoid, and the bag is a heavy lift.