Alamo City Lawn & Stone
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When is the best time to plant grass in San Antonio?
San Antonio sits in USDA zone 8b-9a with a long ~280-day growing season – the average last freeze is in late February and the first freeze in late November to early December. San Antonio lawns are warm-season only (St. Augustine, Bermuda, Zoysia, Buffalo grass), so the best time to plant or sod is after the last freeze, late February through summer, once the soil is warm and the grass is actively growing. Warm-season grass is aerated in late spring and summer, not fall, and never needs a fall fescue overseed. The hardest task is surviving the summer heat within SAWS once-a-week watering.
Source: Texas A&M AgriLife / NOAA / USDA. Updated 2026-06-16.
| Month | San Antonio warm-season lawn task |
|---|---|
| Jan-Feb | Dormant/brown; mow only to top weeds; service mower; soil test; spring pre-emergent late Feb (last freeze ~late Feb) |
| Mar | Green-up; resume mowing; first plant/sod window opens after last freeze; hold heavy nitrogen until greened |
| Apr-May | Active growth; first fertilizer after green-up; AERATE (late spring); sod/plant; mow weekly |
| Jun-Aug | Peak heat/drought; survive within SAWS once-a-week watering; mow high; do NOT fertilize stressed turf; watch chinch bugs |
| Sep | Final fertilizer by early-mid September; fall pre-emergent for winter weeds |
| Oct-Nov | Growth slows; reduce mowing/watering; first freeze ~late Nov-early Dec -> dormancy |
| Dec | Dormant; minimal watering; plan next season |
When is the best time to plant grass in San Antonio?
Plant or sod warm-season grass in San Antonio after the average last freeze in late February, through spring and summer, once the soil is reliably warm – St. Augustine and Zoysia go in as sod, Bermuda and Buffalo grass can be seeded. This gives the grass the long, hot growing season it needs to establish. Avoid planting in winter dormancy, and remember new grass needs extra hand-watering (allowed any day) while it roots under SAWS restrictions.
How do you care for a San Antonio lawn in summer?
San Antonio summers are about survival within drought rules: mow high (St. Augustine 3.5-4 inches) to shade the soil, water deeply only on your SAWS-assigned day (once a week under Stage 3), and never fertilize drought-stressed turf. Watch for chinch bugs in hot, dry St. Augustine, and let the lawn go a little dormant in a heat wave rather than wasting water. A drought-tough grass and mulched soil make summer far easier.
When should you aerate your lawn in San Antonio?
Aerate San Antonio’s warm-season lawns in late spring through summer (April-August) during active growth, when the grass recovers fast – the opposite of cool-season lawns that aerate in fall. Core aeration relieves compaction and helps the limited once-a-week water and nutrients reach roots in the thin, rocky soil. Avoid aerating dormant winter turf.
When should you fertilize a San Antonio lawn?
Fertilize San Antonio warm-season lawns after spring green-up (around April, once actively growing and mowed twice) and give a final feeding by early-to-mid September. Avoid fertilizing in the heat of a drought-stressed summer or during winter dormancy. Because the soil is alkaline, lawns often need iron for green-up more than extra nitrogen – base rates on a soil test.
Do San Antonio lawns go dormant in winter?
Yes. San Antonio’s warm-season grasses (St. Augustine, Bermuda, Zoysia, Buffalo grass) go dormant and turn brown after the first hard freezes, usually staying tan from around December until spring green-up. With a ~280-day growing season and a first freeze around late November to early December, that dormancy is short compared with northern lawns – the grass greens back up as the soil warms in spring.