Watering St. Augustine, Bermuda and Zoysia in Fort Worth

Most Fort Worth lawns are one of three warm-season grasses: St. Augustine, Bermuda or zoysia. They all grow well in North Texas heat, but they differ in how much water they need, how they handle shade and drought, and how tall they are mowed. Those differences affect how you set your sprinkler system. This article explains what each grass needs.

St. Augustine

Traits

St. Augustine has wide, flat blades and spreads by thick above-ground runners. It is common in Fort Worth yards, especially where there is some shade. It is usually mowed taller than Bermuda.

Water needs

St. Augustine generally needs more water than Bermuda or zoysia to stay green in summer. It does not handle long dry spells as well and may not recover as easily from severe drought.

Watering tips

• Water deeply on your assigned days so roots grow down.
• Watch shaded areas; they need less water, and overwatered St. Augustine in shade is prone to disease.
• Water early in the morning so blades dry during the day.
• Use taller pop-up heads so spray clears the higher-mowed grass.

Bermuda

Traits

Bermuda has fine blades and spreads by both above-ground and underground runners. It is common in full-sun yards, athletic fields and parks. It needs full sun and does poorly in shade.

Water needs

Bermuda handles heat and drought well. During long dry spells, it can go dormant and turn brown, then recover when water returns.

Watering tips

• Water deeply but less often. Bermuda’s deep roots can use water stored lower in the soil.
• Bermuda is often mowed short, so standard pop-up heights usually clear it.
• Watch for runoff on clay; Bermuda lawns in full sun often sit on compacted soil.

Zoysia

Traits

Zoysia forms a dense, carpet-like lawn. It handles some shade better than Bermuda and tolerates more foot traffic than St. Augustine. It grows slowly.

Water needs

Zoysia generally falls between St. Augustine and Bermuda in water needs. It can go partly dormant in drought and recover.

Watering tips

• Water deeply and infrequently.
• Its dense growth can hold moisture at the surface; avoid overwatering, which can lead to thatch and disease.
• Keep an eye on thatch buildup, which can make heads sink over time.

Setting Your System for Your Grass

Head height

Taller-mowed grass needs taller pop-ups. If spray hits the grass blades right around the head, try a taller body. Our article on sunken and tilted heads covers raising heads.

Run times

Run times depend on head type and soil more than grass type, but grass type affects how much water you aim for. Start with a moderate run time and adjust based on how the lawn looks and the screwdriver test. Our guide on how long to run each zone explains the method.

Shade vs. sun

Zones in shade need less water than zones in full sun. If a zone covers both, the shaded part may stay too wet. Adjusting nozzles or splitting zones helps.

Mixed Lawns

Many older lawns have a mix of grasses. Bermuda may creep into sunny parts of a St. Augustine lawn, while St. Augustine holds the shade. In mixed lawns, water for the grass in the majority of each zone, and adjust nozzles for the rest.

Seasonal Needs

All three grasses go dormant in winter and need little water then. They green up in spring as soil warms, peak in water use in mid-summer and slow down in fall. Our articles on summer watering in Fort Worth and fall sprinkler adjustments cover each season.

Signs of Too Little Water

• St. Augustine: blades fold and turn dull gray-green; footprints stay visible.
• Bermuda: blades curl and the lawn turns bluish, then tan.
• Zoysia: blades roll and the color dulls.

Signs of Too Much Water

• Soggy soil and mushrooms
• Brown patches with a ring shape, especially in St. Augustine in spring and fall
• Thick thatch and shallow roots
• Runoff

The Rules Apply to Every Grass

Fort Worth’s twice-a-week schedule, the 10 a.m. to 6 p.m. restriction and the water waste rules apply regardless of grass type. Hand watering is allowed at any time for dry spots. Our guide to Fort Worth’s watering schedule explains the rules.

Newly Laid Sod

New sod of any type needs more water than an established lawn until its roots grow into the soil below. For the first couple of weeks, the goal is to keep the sod and the top of the soil under it moist. Lift a corner every few days; once the sod resists, roots are taking hold, and you can start moving toward deeper, less frequent watering. Check with the city about establishment provisions for new landscaping before running spray zones outside your assigned days. Hand watering is allowed at any time.

Choosing Grass for a New Lawn

If you are replacing a lawn, think about sun, shade and water. Bermuda suits full sun and handles dry spells. Zoysia handles some shade and traffic. St. Augustine does well with partial shade but needs more water. Matching the grass to the site makes watering on a twice-a-week schedule much easier.

Thatch and Water

A thick thatch layer, the mat of stems and roots between the grass blades and the soil, can shed water like a roof. Water runs off or sits in the thatch instead of reaching the soil. If your lawn has more than a thin layer, dethatching or core aeration helps water reach the roots.

When to Call a Technician

If parts of your lawn struggle because heads are too short, zones mix sun and shade, or coverage is uneven, our sprinkler repair service can adjust or change heads to fit your grass.