When should I put down the first fertilizer on bermuda grass?

Once the lawn is roughly 50% green and your last frost date has passed, typically mid-April to May depending on how far south you are. Soil at 2 inches should be holding above 65°F.

What happens if you fertilize bermuda too early?

Two things. The nitrogen feeds cool-season weeds that are growing while your grass is not, and it pushes tender new growth that a late frost will burn.

How much nitrogen does a warm-season lawn need?

About 1 pound of nitrogen per 1,000 square feet per application, every 4 to 6 weeks through the growing season. Bermuda is hungrier than zoysia or centipede, and centipede is actively harmed by too much.

Should I fertilize before or after the first mow?

After. Mowing first clears winter debris and shows you how much of the lawn has actually greened up, which is the signal you are waiting for.

When to Fertilize a Warm-Season Lawn in Spring

Fertilize a warm-season lawn when it is about half green and past your last frost date, usually mid-April to May. Not at the first warm week, not when the garden center stacks the bags out front, and not on the schedule your neighbor with fescue follows.

The signal is the grass, not the date

Bermuda, zoysia, St. Augustine and centipede are dormant through winter. Brown is normal and healthy. They green up when soil at 2 inches holds steadily above about 65°F, and that is also the point at which they can use nitrogen.

Fertilizing before green-up does two bad things at once. It feeds the weeds, because winter annuals are growing while your lawn sleeps, so nitrogen applied in February goes almost entirely to them. And it forces vulnerable growth, because nitrogen pushes tender new blades that a late frost burns, setting the lawn back further than doing nothing would have.

The sequence for spring

Wait for green-up, roughly 50% of the lawn showing color.
Confirm the frost date has passed. A frost after you fertilize undoes the work.
Take the first mow, slightly low, to clear winter debris and let light reach the soil.
Then fertilize, 1 lb of nitrogen per 1,000 sq ft.
Water it in with about a quarter-inch unless rain is coming.

How much, and how often

One pound of nitrogen per 1,000 square feet per feeding, every four to six weeks through the growing season. That is the general rule. The species matter more than people expect:

Grass	Nitrogen appetite
Bermuda	Highest, 4–6 lb N per 1,000 sq ft per year
Zoysia	Moderate, 2–3 lb
St. Augustine	Moderate, 2–4 lb
Centipede	Low, 1–2 lb, and over-feeding causes decline

Centipede is the one that catches people out. It evolved on poor, acidic soil, so treating it like bermuda produces thinning and disease rather than growth. If you inherited a centipede lawn and have been feeding it on a bermuda schedule, that alone may explain why it looks worse every year.

The end of the season matters too

Stop nitrogen 6 to 8 weeks before your first expected frost. Late feeding pushes soft growth into the cold and is one of the main causes of winter kill in bermuda and zoysia.

This is the exact opposite of cool-season practice, which is why generic national advice is so unreliable here. Winterizer fertilizer is genuinely useful in the north and genuinely harmful on a warm-season lawn.

What to do next

Two other spring jobs key off the same green-up signal. Spring bermuda seeding needs soil above 65°F, the same threshold you just waited for.

Crabgrass preventer, on the other hand, goes down well before any of this. In the warm-season zone that can be as early as February: when to apply pre-emergent.