How to Water Your Rockwall Lawn Through a North Texas Summer

By late June, most lawns around Lake Ray Hubbard are dealing with triple-digit afternoons, hard clay soil, and weeks without meaningful rain. The grass that looked lush in April starts to thin, brown out in patches, and pull away from sidewalks. Nine times out of ten, the problem isn't the grass — it's how it's being watered.

North Texas clay is the biggest complication. It holds water well once it's saturated, but it also sheds water fast when it's dry and compacted. If you run your sprinklers for ten minutes every morning, most of that water runs off into the street before it ever reaches the roots. The goal in summer is to water deeply and less often, training roots to grow down where the soil stays cooler and holds moisture longer.

For established Bermuda and St. Augustine lawns — the two most common grasses in Rockwall and Rowlett — aim for about one to one and a half inches of water per week, including rainfall. Split that into two or three soakings rather than daily sprinkles. Deep, infrequent watering builds drought-tolerant roots; shallow daily watering builds a lawn that panics the moment you skip a day.

To beat the clay runoff problem, use the cycle-and-soak method. Instead of running a zone for 20 minutes straight, run it for 7 or 8 minutes, let it soak in for half an hour, then run it again. Your controller can usually be programmed to do this automatically. You'll see far less water running down the driveway and much better absorption.

Water early — ideally between 4 and 8 a.m. Watering in the evening leaves grass blades wet overnight, which invites fungus like brown patch, something we see constantly in St. Augustine lawns near the lake where humidity runs high.

Your grass will tell you when it's thirsty before it turns brown. When blades fold in half lengthwise, take on a blue-gray cast, or footprints stay pressed down instead of springing back, it's time to water. Learning to read those signs keeps you from overwatering on autopilot.

It's also worth walking your irrigation system with the controller running each zone. Heads get knocked out of alignment by mowers, clog with mineral buildup, or sink below grade over time. A single misaligned head can leave a dry streak that no amount of extra runtime will fix. Rockwall and Rowlett both follow watering restrictions during peak summer, so an efficient, well-tuned system isn't just about a greener lawn — it keeps you compliant and keeps your bill down.