How to Prepare Your Lawn for a Central Texas Summer

Central Texas summers are not for the faint of heart — or the unprepared lawn. Temperatures regularly exceed 100°F from June through August, rainfall is scarce and unpredictable, and the combination of heat, drought, and intense UV radiation can stress even the toughest warm-season grasses. The good news is that with the right preparation in spring, your lawn can not only survive but thrive through the summer months.

Here's the complete spring preparation checklist that our Grass Works Austin crews follow for our maintenance clients across the Austin metro and Highland Lakes area.

1. Aerate in Late Spring

Core aeration is one of the most important things you can do to prepare your Austin lawn for summer. Aeration removes small plugs of soil from the lawn, relieving compaction and allowing water, air, and nutrients to penetrate deeper into the root zone. This is especially important in Austin's heavy clay soils, which compact easily under foot traffic and summer heat.

The best time to aerate warm-season grasses in Austin is late April through May, after the grass has fully greened up but before the summer heat arrives. Aeration opens up the soil just in time for summer fertilization and watering to be maximally effective.

2. Fertilize at the Right Time

Fertilizing too early in spring — before the soil temperature reaches 65°F — can stimulate growth that's vulnerable to late frost damage. Fertilizing too late — after the summer heat has set in — can stress the grass. The sweet spot for summer fertilization in Austin is late April through May.

Use a slow-release nitrogen fertilizer for summer applications. Slow-release formulations feed the grass gradually over 6–8 weeks, preventing the surge-and-crash growth cycle that fast-release fertilizers can cause. Avoid fertilizing during drought stress or when temperatures are above 95°F.

3. Check and Service Your Irrigation System

Before summer arrives, have your irrigation system inspected and serviced. Check for broken or misaligned sprinkler heads, clogged drip emitters, and controller programming errors. A single broken sprinkler head can leave a dry spot in your lawn that becomes a dead spot by August.

Update your controller's watering schedule for summer — most Austin lawns need to water 2–3 times per week during peak summer heat, compared to once per week in spring and fall. Make sure your schedule complies with current Austin Water or MUD water restrictions.

4. Raise Your Mowing Height

Taller grass is more drought tolerant. As summer approaches, raise your mowing height by about half an inch above your normal setting. For Bermuda grass, this typically means mowing at 2–2.5 inches instead of 1.5 inches. For St. Augustine, raise from 3 inches to 3.5–4 inches. Taller grass shades the soil, reducing evaporation and keeping soil temperatures lower.

Never remove more than one-third of the grass blade in a single mowing — this is especially important during summer heat stress. If your lawn gets ahead of you, mow it back gradually over two or three mowings rather than scalping it all at once.

5. Apply Pre-Emergent Weed Control

Summer weeds — crabgrass, goosegrass, and spurge — germinate when soil temperatures reach 55–60°F, typically in March and April in Austin. Applying a pre-emergent herbicide in late February or early March creates a barrier in the soil that prevents weed seeds from germinating. This is far more effective than trying to control weeds after they've already emerged.

Our lawn care maintenance programs include seasonal pre-emergent and post-emergent weed control applications timed to Austin's climate. Contact us to learn more about our fertilization and weed control programs.