Choosing a Drought-Tolerant Grass for Your Austin Yard

Every spring our phones fill up with the same question: what grass should I plant so I can stop fighting my water bill? It is a fair thing to ask in Austin. Stage 2 watering rules have become a normal part of summer, July rarely brings a drop of rain, and a thirsty lawn can easily account for half of a household’s outdoor water use. The good news is that you do not have to choose between a green yard and a reasonable bill. You just have to pick a grass that was built for this climate and then treat it the way it wants to be treated.

Luis here. I have been mowing, patching and replacing lawns around Austin since 2011, and I have seen every grass on this list succeed and fail. The grass type matters, but the site matters just as much. Below is how we walk customers through the decision, along with the honest trade-offs our crews see in real yards.

Start with your yard, not the seed bag

Before you fall in love with a picture of a carpet-soft lawn, spend a day watching your yard. Three things decide which grass will thrive:

• Sun hours. Count how many hours of direct sun each part of the yard gets in midsummer. Under 4 hours is shade, 4 to 6 is part sun, and 6 or more is full sun.
• Soil depth. West of MoPac, many yards have 4 inches of soil over limestone. East of I-35, you are more likely to find heavy black clay that cracks in August. Push a long screwdriver into the ground after a rain and note where it stops.
• Traffic. Dogs, kids and soccer games need a grass that repairs itself quickly. A front yard that mostly gets admired can use something slower and tougher.

Write those three answers down. They will narrow the field faster than any brochure.

The four grasses we actually recommend

Bermuda: tough, fast and sun hungry

Common and hybrid Bermuda handle heat, drought and foot traffic better than almost anything else. Bermuda can go dormant in a long dry spell and green back up within a week or two of steady watering. It spreads aggressively, which is great for repairing worn spots and less great when it creeps into your flower beds. The big catch is shade. Bermuda wants 7 or more hours of sun and thins out quickly under live oaks. In a sunny yard with active kids, it is hard to beat, and seed or sod runs roughly $0.45 to $0.80 per square foot installed in our area.

Zoysia: slower, denser and more forgiving

Zoysia makes a thick, soft lawn that chokes out many weeds on its own. It tolerates more shade than Bermuda, often doing fine with 5 hours of sun, and it needs less mowing because it grows slowly. That slow growth is also its weakness: if your dog digs a hole in June, it may still be there in September. Zoysia sod costs more, typically $0.90 to $1.30 per square foot installed, but many homeowners find the lower water and mowing needs pay that back.

Buffalograss: the true native

Buffalograss is native to the Great Plains and can survive on rainfall alone in many years. It has a blue-green color, grows only 4 to 6 inches tall if you never mow it, and looks like a soft meadow. It is the lowest-water option we install. It does not like shade, heavy traffic or too much water and fertilizer, which can actually let weeds outcompete it. For a sunny front yard where you want a natural look, it is a wonderful choice.

St. Augustine: the shade option, with conditions

St. Augustine is the most common lawn in Austin because it handles shade better than any other warm-season grass. It is not drought tolerant in the true sense; it needs about an inch of water a week in summer to stay green. If your yard sits under a canopy of oaks and pecans, though, it may be the only turfgrass that will grow there. We suggest a shade-tolerant variety and a smaller lawn area, with mulched beds taking over the spots it cannot handle.

The best drought-tolerant lawn is often a smaller lawn. Put grass where people walk and play, and give the rest to plants that never need mowing.

Luis Romero

Water numbers that help you compare

Exact needs depend on soil and weather, but these are the summer averages our crews plan around when we set up irrigation controllers:

1. Buffalograss: about a quarter inch a week, or none in a wet summer
2. Bermuda: about half an inch a week to stay green, less if dormancy is acceptable
3. Zoysia: roughly half to three quarters of an inch a week
4. St. Augustine: about one inch a week, more in shallow soil

On a 3,000-square-foot lawn, one inch of water a week is close to 1,900 gallons. Over a 16-week summer that adds up quickly, which is why the switch from St. Augustine to Bermuda or zoysia in a sunny yard often shows up on the water bill within the first season.

Seed, sod or plugs?

Bermuda and buffalograss can be grown from seed, which is the cheapest route. Seed goes down between late April and June when soil temperatures stay above 65 degrees, and it needs light daily watering for about three weeks. Expect a usable lawn in 8 to 10 weeks.

Sod gives you a finished lawn on day one and is the only realistic choice for St. Augustine and most zoysia. It costs more and still needs careful watering for the first two to three weeks while the roots knit into the soil. Plugs, small squares of sod spaced 12 inches apart, sit in the middle: cheaper than full sod, but it can take a full season for them to fill in.

Prep is where lawns succeed or fail

Whatever grass you choose, the first six inches of soil decide how well it handles drought. A lawn rooted in 2 inches of compacted fill will wilt by noon in July no matter what variety it is. Before we lay any grass, our crews remove the old turf, loosen the soil, work in about an inch of compost and grade the yard so water flows away from the house. In thin soil over limestone, we often bring in 2 to 4 inches of a sandy loam blend so the roots have somewhere to go.

After installation, train the roots to grow deep. Water lightly and often for the first two weeks, then gradually stretch the time between waterings while giving more water each time. By the end of the first summer, you want to be watering once a week, deeply, early in the morning. Deep, infrequent watering is the single biggest habit that makes any of these grasses more drought tolerant.

A few mistakes we see every year

Planting Bermuda under trees and wondering why it fails. Fertilizing buffalograss like a golf course. Laying sod in August without a plan to water it twice a day. Mowing zoysia too short so it scalps and browns. Each of these is easy to avoid once you know what the grass wants, and none of them is a sign that drought-tolerant lawns do not work here.

If you are not sure which grass fits your yard, our crew leads are happy to walk the property with you, check sun and soil, and give you an honest recommendation, even if the answer is a smaller lawn and a bigger bed. You can reach us at 555-0142 or hello@greenline.example.