St. Augustine grass does its growing in the heat, spreading by runners through summer, and a liquid feed is an easy way to keep up with that curve. Our St. Augustine Grass Fertilizer leads with nitrogen for green, spreading turf and goes on by hose-end sprayer, with coverage stated on the bottle.
A warm-season lawn uses nutrients most while it is fully green and growing and very little while it is brown, so feeding follows the season rather than the calendar. Thin, pale turf in midsummer on sandy ground is the usual case; a lawn that is dormant or stressed by drought is not the time.
Our formula puts nitrogen first for leaf and runner growth, with smaller amounts of phosphate and potash, plus calcium, magnesium and micronutrients including iron. As a liquid it spreads across the lawn with the water, and a hose-end sprayer makes a larger area practical.
Mix at the rate on your bottle and apply over the lawn during active summer growth, by hose-end sprayer, every one to two weeks in season and about every four weeks as growth slows. Skip applications ahead of heavy rain and follow local rules on lawn fertilizer.
Why growers choose it: A liquid lawn feed for warm-season turf that goes on with the hose and follows the grass's own season.
Plant-Focused Nutrition • Easy to Use
Free shipping1M+ Bottles SoldMade in Seattle
Do not fertilize dormant St. Augustine grass, apply before heavy rain, or ignore local phosphorus and nitrogen restrictions; fertilizer cannot resolve insufficient sunlight or disease.
vibrant green
Supports rich green color for a healthy, vibrant st. augustine lawn.
new growth
Supports fresh blade and runner development during active growth.
fuller coverage
Supports healthy spreading growth for a thicker, more evenly filled-in lawn.
Watering can
2 Tbs (30 mL) per gallon of water
Spring & summer: every 1–2 weeks during active growth · Fall & winter: every 4 weeks only if the grass remains actively growing
Hose-end sprayer
Set dial to the 1 oz (30 mL) setting
Spring & summer: every 1–2 weeks during active growth · Coverage: about 2 Tbs per 100 sq ft
The most shade tolerant of the warm-season grasses, though it still wants four to six hours of sun. Thin patches under trees usually mean too little light.
About three quarters of an inch to an inch a week, given in one or two deep soakings. Shallow daily watering builds weak roots and invites fungus.
Sandy, well-drained soil, pH 6.0 to 7.5. The grass spreads across the surface by runners, so keep thatch thin and relieve compaction where your lawn gets heavy traffic.
Mow at 3 to 4 inches and take no more than a third of the blade at once. Mowing tall shades out weeds and protects the runners that fill in bare spots.
Feed St Augustine Grass Fertilizer every one to two weeks through the warm growing season, then ease off as growth slows and your lawn goes dormant in cool weather.
A warm-season grass that greens up as soil warms toward 80F and browns after frost. It is the least cold hardy southern lawn grass, so avoid late fall pushes of growth.
St Augustine Grass Fertilizer is timed to your lawn's active season. Start after your turf has fully greened up in spring, when the roots are growing and can use what you apply, and feed every four to six weeks through summer. Stop about a month before your first frost; feeding late pushes tender growth that winter damages, and a lawn heading into dormancy can’t use the nitrogen anyway. In the deep South where St. Augustine barely rests, the same rule holds: feed while it’s actively growing.
A hose-end sprayer set to the recommended rate covers a lawn in one pass, and that’s how most people apply St Augustine Grass Fertilizer; a watering can handles small patches, new sod or a thin spot. Apply in the morning or evening rather than in full midday heat, and water in lightly afterward so the nutrients move down to the roots rather than sitting on the blades. Because it’s a liquid, it spreads evenly across the root zone instead of landing in clumps.
That pattern is iron chlorosis, and it’s common in St. Augustine growing in alkaline or sandy soil, and after heavy rain leaches the root zone. The iron is often present but locked away at high pH, so your grass can’t make enough chlorophyll and the blades pale between the veins. St Augustine Grass Fertilizer includes iron along with other micronutrients to green your lawn back up without piling on nitrogen, which is the mistake that builds thatch and soft growth without fixing the color.
Yes, once it has been watered in and your grass is dry. St Augustine Grass Fertilizer contains plant nutrients only, with no herbicides or pesticides, so there’s nothing in it designed to act on anything but the grass. Apply it, water it in lightly, and let the blades dry before letting children and pets back onto your lawn. That short wait is about keeping the mix in the soil where the roots use it rather than on feet and paws.
St Augustine Grass 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: too much product in too little water, or granules dropped unevenly in streaks and piles. Mixed at the recommended dilution and applied every four to six weeks, the nutrients arrive in solution across the whole lawn at a strength the roots take up as they water. Keep to that mix, water it in lightly, and skip application in extreme heat.
Color comes first. Most St. Augustine lawns green up within one to two weeks of the first feeding, since a liquid is available to the roots as soon as it’s watered in and the iron in St Augustine Grass Fertilizer goes to work on chlorosis quickly. Thickening takes longer: your grass has to grow new runners and fill in, so density builds over a few applications on the four to six week schedule. Consistent mowing height and watering help that spread as much as the feed does.
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