Alamo City Lawn & Stone
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How do you care for a lawn in San Antonio’s heat and drought?
Caring for a San Antonio lawn is about surviving extreme heat and Edwards Aquifer (SAWS) drought restrictions. The keys: choose a warm-season, drought-tough grass (Buffalo grass or Bermuda, or St. Augustine for shade); mow high (St. Augustine 3.5-4 inches) to shade the roots; water deeply but only on your SAWS-assigned day – currently once a week under Stage 3; and never fertilize drought-stressed turf. Improve the thin, alkaline limestone and caliche soil with compost and mulch so it holds moisture. The goal is a resilient lawn that survives San Antonio summers within the watering rules, not a thirsty one that browns out between waterings.
Source: Texas A&M AgriLife / SAWS. Updated 2026-06-16.
| Task | San Antonio heat & drought approach |
|---|---|
| Grass choice | Buffalo grass or Bermuda (low water); St. Augustine for shade |
| Mowing height | Mow high (St. Augustine 3.5-4 in) to shade soil and roots |
| Watering | Deep, on your SAWS day only (once/week under Stage 3); hand-water new areas |
| Fertilizing | After spring green-up and by mid-September; never on stressed turf |
| Soil | Add compost + mulch over thin alkaline caliche/limestone to hold moisture |
| Pests | Watch chinch bugs (hot, dry St. Augustine) and grubs |
| Drought stress | Footprints that stay, blue-gray color = water on your next legal day |
How do you keep a San Antonio lawn green during drought restrictions?
Under SAWS once-a-week watering, the trick is efficiency, not more water: water deeply on your assigned day (the legal 5-10 a.m. window soaks in best), mow high to shade the soil, and choose a drought-tough grass like Buffalo grass or Bermuda. Mulch beds and add compost so the thin soil holds moisture, hand-water only truly dry spots, and accept a little summer dormancy. A resilient lawn beats a thirsty one in a Stage 3 year.
How high should you mow your lawn in San Antonio’s heat?
Mow on the high side in San Antonio – St. Augustine at about 3.5-4 inches, Zoysia and Bermuda a bit lower – and never remove more than one-third of the blade at once. A taller canopy shades the soil, slows evaporation, keeps roots cooler, and crowds out weeds, all of which matter under once-a-week watering. Keep the mower blade sharp; ragged cuts stress an already heat-stressed lawn.
Why is my San Antonio lawn dying in summer?
The usual culprits are drought stress (too little water under the once-a-week limit), chinch bugs (expanding brown patches in hot, sunny St. Augustine), or grubs. Rule out chinch bugs first by parting the grass at a green-to-brown edge and looking for small insects. Deep watering on your legal day, a drought-tough grass, and mulched soil prevent most summer decline; confirm pests before treating.
Should you fertilize a San Antonio lawn in summer?
Avoid fertilizing San Antonio lawns in the heat of summer, especially drought-stressed turf – it forces growth the lawn can’t water and can burn it under the once-a-week limit. Feed after spring green-up (around April) and give a final feeding by mid-September. In the alkaline soil, a yellowing lawn usually needs iron, not nitrogen, so a soil test saves money and avoids stressing the grass.
What is the lowest-maintenance lawn for San Antonio?
For the least water and upkeep in San Antonio, Buffalo grass is the lowest-maintenance choice – a Texas native that survives on minimal irrigation in full sun. Pair it with mulched, compost-improved soil and you have a lawn built for drought restrictions. Bermuda is a tougher, more traffic-tolerant low-water option; St. Augustine is higher-maintenance but the go-to for shade. Match the grass to your light and water goals.