Best High-Nitrogen Liquid Lawn Fertilizer: Simple Lawn Solutions 28-0-0 (2026)

Liquid vs Granular High Nitrogen Fertilizer: Which Should You Buy?

If you are shopping high nitrogen in general, the honest answer is that liquid and granular are different tools, not competitors. A fast-release liquid nitrogen is the best fast release nitrogen fertilizer play: the leaf absorbs part of it directly, so you see green-up in 24 to 48 hours. The trade-off is that it runs out faster, usually feeding for two to four weeks.

A granular high-nitrogen fertilizer with a large slow-release fraction is the opposite: slower to show color, but one pass can feed for six to eight weeks, which makes it the cheaper, lower-effort base for a season-long program. Plenty of lawns do best on a hybrid program: granular as the backbone feed a few times a year, with a liquid 28-0-0 for quick corrections, even coverage on odd-shaped areas, or light spoon-feeding between granular apps.

Why a 28-0-0

The first number on a fertilizer label is nitrogen, the nutrient that builds chlorophyll and drives the deep green color and growth most people are chasing. A 28-0-0 is almost pure nitrogen with zero phosphorus and zero potassium, which makes it the tool you reach for when a soil test shows your phosphorus and potassium are already fine and the lawn just needs to be fed.

What Do 28-0-0 and Similar High Nitrogen Formulas Mean?

Those three numbers are the percent by weight of nitrogen, phosphorus, and potassium, so a 28-0-0 is 28 percent nitrogen and nothing else. In most liquid 28-0-0 products the nitrogen comes from urea and ammonium nitrate, and the label will tell you how much of it is quick-release versus slow-release. The bigger the quick-release fraction, the faster the color and the higher the burn risk, which is why watering it in lightly and skipping hot, dry afternoons matters more with these than with a balanced feed.

The pick: Simple Lawn Solutions Maximum Green 28-0-0

How to apply it without burning the lawn

High nitrogen is where a liquid is most likely to burn if you rush it, so a little care goes a long way. Apply to a dry, recently mowed lawn in the cool of the day, water it in lightly afterward, and never feed a dormant or drought-stressed lawn. Follow the label rate; with nitrogen, more is not better, and a double dose burns. To get the exact ounces for your lawn size, run it through the fertilizer calculator.

When to use it (and when not to)

A 28-0-0 shines during active growth in spring and summer, for a fast correction when the lawn is pale, or before an event when you want it looking its best. Skip it heading into dormancy, since late nitrogen on warm-season grass weakens cold tolerance, and skip it in peak heat or drought. If your lawn needs color but not more growth, reach for iron instead, covered in our best liquid iron guide.

Frequently asked questions

• What is the best high-nitrogen liquid lawn fertilizer? For most lawns, a 28-0-0 with a quick and slow-release blend like Simple Lawn Solutions Maximum Green. It greens up fast and keeps feeding for a couple of weeks.
• How fast does a 28-0-0 work? Usually a few days. The quick-release nitrogen is taken up through the leaf, so color shows well ahead of a granular feed.
• Can high-nitrogen fertilizer burn the lawn? Yes, if over-applied or used in heat. Apply to a dry lawn in the cool of the day, water in lightly, and follow the label rate.
• Should you use 28-0-0 in fall? Not on warm-season grass heading into dormancy. Late nitrogen reduces cold tolerance. Use it during active spring and summer growth.

For the full set of liquid options ranked by need, see the best liquid lawn fertilizer guide, and for the year-round picture, the complete fertilizing guide.