Bahiagrass Lawn Care Schedule — USDA Zone 9

Spring pre-emergent (crabgrass)

Apply a pre-emergent herbicide as soil temperatures climb through the low 50s°F — before they reach the ~55°F at which crabgrass germinates — to stop summer weeds before they start. A second application 6–8 weeks later extends control through the season.

⚠️Don't apply a pre-emergent if you plan to seed — it blocks grass seed too. Always read and follow the product label — it is the legal authority on rates, timing, and safety. These windows are regional estimates, not a prescription; defer to the label and your local extension office.

Spring green-up & first mow

Warm-season turf begins breaking dormancy as soil temperatures reach about 55°F, but it isn't actively growing until the soil warms to roughly 65°F. Once it's about half green, mow low to clear dormant material and let sunlight reach the crowns. Don't fertilize until it's at least 80% green and growing.

First feeding

Make the first fertilizer application 2–4 weeks after full green-up, once the lawn is actively growing. Feed lightly — about 1–3 lbs of nitrogen per 1,000 sq ft per year. On the high-pH or alkaline soils bahiagrass sometimes grows in, yellowing is usually iron chlorosis rather than a nitrogen shortage, so reach for an iron supplement instead of piling on more nitrogen.

⚠️Some herbicides used on other Southern lawns are meant to KILL bahiagrass — read the label carefully and confirm it is safe for bahiagrass first. Keep nitrogen at or below ~1 lb per 1,000 sq ft per feeding, and use iron, not extra nitrogen, for high-pH yellowing. Always read and follow the product label — it is the legal authority on rates, timing, and safety. These windows are regional estimates, not a prescription; defer to the label and your local extension office.

Aeration & dethatching

Core-aerate (and dethatch if the thatch layer is over about ½") during the peak growing season, when warm-season turf recovers fastest. Avoid aerating dormant or drought-stressed turf.

Summer feeding program

Summer is the warm-season growth peak. Feed lightly — about 1–3 lbs of nitrogen per 1,000 sq ft per year. On the high-pH or alkaline soils bahiagrass sometimes grows in, yellowing is usually iron chlorosis rather than a nitrogen shortage, so reach for an iron supplement instead of piling on more nitrogen. Spread the annual budget across the season rather than applying it all at once.

⚠️Never exceed ~1 lb of nitrogen per 1,000 sq ft in a single feeding. Always read and follow the product label — it is the legal authority on rates, timing, and safety. These windows are regional estimates, not a prescription; defer to the label and your local extension office.

Summer weed & pest watch

Spot-treat broadleaf weeds during active growth, never on drought-stressed turf. Watch for insect and disease pressure in hot, humid weather and treat problem areas rather than the whole lawn.

Final feeding & soil test

Give a final feeding in early fall, then stop nitrogen — late-season nitrogen pushes tender growth into frost. Fall is also the best time to take a soil test so amendments are ready before spring.

⚠️Stop nitrogen about 6 weeks before your first expected frost. Always read and follow the product label — it is the legal authority on rates, timing, and safety. These windows are regional estimates, not a prescription; defer to the label and your local extension office.

Fall pre-emergent (winter weeds)

A fall pre-emergent applied before soil cools below about 70°F controls winter annual weeds like Poa annua and henbit.

⚠️Always read and follow the product label — it is the legal authority on rates, timing, and safety. These windows are regional estimates, not a prescription; defer to the label and your local extension office.

Winter dormancy

Expect a brown, dormant lawn from first frost until spring green-up. Hold off on fertilizer and pre-emergent. A light watering during extended winter drought helps prevent desiccation.