Kentucky Bluegrass Fertilizer for Cool-Season Lawns

When your bluegrass lawn may benefit from feeding

When the lawn is growing strongly through the cool weeks of spring and needs mowing often
When fall growth returns after summer heat and the lawn is rebuilding before winter
When the turf is recovering after you core aerate or overseed thin areas
When a sandy or heavily irrigated lawn loses what you apply between feedings

Avoid pushing nitrogen into a cool-season lawn during midsummer heat — browning in drought is dormancy, and the grass usually recovers when temperatures drop. A thick thatch layer keeps what you apply from reaching the roots, and local nitrogen and phosphorus rules still apply.

Results you can see

Feeds foliage for deeper color and a brighter, more lively look.

Encourages fresh leaf and stem growth for a fuller, thriving plant.

Supports healthy, resilient roots that absorb nutrients more effectively.

Works for bluegrass lawns and blends

Kentucky Bluegrass
Midnight Bluegrass
Bewitched Bluegrass
Award Bluegrass
Blue Note Bluegrass
Nuglade Bluegrass
Bluegrass-fescue Blends
Bluegrass-rye Mixes

Label facts

NPK 8-1-2 with 1.5% calcium and 0.75% magnesium, plus iron, manganese, zinc, boron and copper.

Derived from kelp (ascophyllum nodosum), potassium nitrate, potassium phosphate, calcium nitrate, magnesium nitrate, boric acid, copper sulfate, ferric sulfate, manganese sulfate, zinc sulfate, urea.

One 8 oz bottle makes 8 gallons of feed at 2 Tbs per gallon — the 32 oz makes 32.

Store cool and dark. Guaranteed 12 months from purchase; keeps up to 2 years.

How to care for Kentucky bluegrass

Light

Bluegrass wants six to eight hours of sun. It thins under dense shade, so in heavy tree cover overseed with fine fescue rather than pushing bluegrass.

Water

About one to one and a half inches of water a week, rain included, given in one or two deep soakings rather than a light daily sprinkle.

Soil

Prefers well-draining loam at pH 6.0 to 7.0. Core aerate a compacted lawn in early fall so water, air and nutrients reach the root zone.

Mowing

Mow at 2.5 to 3.5 inches and take no more than a third of the blade at once. Taller grass shades out crabgrass and keeps roots deeper.

Feeding

Feed Kentucky Bluegrass Fertilizer through the growing season, weighting it toward early fall, when bluegrass does most of its root and tiller growth for the year.

Temperature

A cool-season grass that grows hardest at 60 to 75F. It slows and can go dormant and tan in midsummer heat, then greens up again as nights cool.

Frequently asked questions

When should I fertilize Kentucky bluegrass?

Kentucky bluegrass is a cool-season grass, so it grows hardest in spring and fall and rests through summer heat. Feed with Kentucky Bluegrass Fertilizer in spring as your lawn greens up, then again in early fall. The fall feeding is the one that matters most: cooler nights and warm soil let your grass put nitrogen and potassium into roots, tillers and color that carry through winter and into next spring, rather than into fast top growth you have to mow.

How do I apply it to a lawn?

Kentucky Bluegrass Fertilizer is a liquid, so it goes on with water rather than a spreader. A hose-end sprayer set to the recommended rate covers a lawn in one steady pass, walking at an even speed so every section gets the same amount; a watering can works for small patches and repairs. Apply in the morning or evening when your grass isn’t under full sun, then water in lightly so the nutrients move off the blades and into the root zone.

Why does my bluegrass go brown in summer?

Heat dormancy. Kentucky bluegrass slows and browns in high summer as a way of protecting itself, then greens back up on its own when nights cool. Pushing it with heavy feeding in the heat asks for growth your grass can’t sustain, so hold off on Kentucky Bluegrass Fertilizer during the hottest weeks. Water deeply and less often to keep the crowns alive, then feed again in September, when the grass is actively growing and can use the nitrogen and potassium.

Is it safe for kids and pets?

Yes, once it has been watered in and your grass is dry. Kentucky Bluegrass Fertilizer contains nutrients only, with no herbicides or pesticides, so the usual precaution is simply to let the application settle into the soil before your lawn goes back into use. Apply it when the lawn is clear, water in lightly, and let the blades dry; after that, normal play and foot traffic can resume.

Will it burn my lawn?

Kentucky Bluegrass Fertilizer is a dilute liquid feed, and dilution is what matters here. Fertilizer burn on a lawn happens when concentrated salts sit against the roots, usually from an over-filled or unevenly walked granular spreader that leaves streaks and scorched spots. A liquid applied at the recommended rate spreads evenly across the whole lawn and is taken up as it is watered in. Skip application in extreme heat, when your grass is dormant and stressed and can’t use the feed.

When will I see results?

Color comes first. Most lawns fed with Kentucky Bluegrass Fertilizer green up within one to two weeks of the first application, since the nutrients are in solution and reach the roots as soon as they are watered in. Thickening takes longer: bluegrass fills in by spreading underground and sending up new tillers, so density builds over a few applications through the spring and fall growing seasons, with the fall feeding doing the most for the following year.

Let's Start Growing!

Choose your size