In cool weather, new sod in North Texas needs far less water than the summer schedule you have probably read about. For a fall install (September through November), water 2 short cycles a day for the first week, 1 to 2 cycles a day in week two, then every other day in weeks three and four, always in the morning. For a dormant winter install (December through February), skip the daily cycles and water once every 2 to 3 dry days for the first two weeks, then about once a week when the ground is not frozen.
Here is the schedule by phase, why it differs from summer, and how to tell when the sod has rooted.
Why the summer schedule is wrong for fall and winter
Our summer watering post says 3 or more short cycles a day for the first two weeks. That is right in July. It will drown a lawn in November.
The reason is evapotranspiration, the water a lawn loses to sun and air. In a typical DFW July a lawn can lose around a quarter inch a day. By late October it is often under a tenth of an inch, and on a cloudy December day close to nothing. New sod still has no roots and still depends on you, but the bucket drains much slower.
Overwatering in cool weather is not harmless either. Cool nights plus wet blades is the recipe for fungus on Bermuda, Zoysia, and especially St. Augustine. Water in the morning only so the blades dry by midday.
Fall install schedule (September through November)
This is the schedule we hand out for fall installs across Carrollton, Plano, Frisco, Coppell, and Lewisville.
Days 1 to 7. Water 2 short cycles a day, one at sunrise and one late morning. Keep the top inch of soil moist, not soggy. If it is early September and highs are still in the mid 90s, treat that week like summer and run 3 cycles. If a front drops highs into the 70s, 2 is plenty.
Days 8 to 14. Drop to 1 to 2 cycles a day, morning only. Skip the day after a measurable rain. Check the seams and outside edges, because those dry first.
Weeks 3 and 4. Water every other day with one longer morning soak instead of two short ones. This teaches roots to chase water down instead of sitting at the surface. Do the tug test (below) at the start of week three.
After rooting. Once the sod resists a tug, move to your city's normal twice-a-week schedule, roughly a half inch on each watering day, the same DFW lawn watering schedule established grass runs on. By November, growth has essentially stopped and once a week on a dry stretch is usually enough.
Most DFW cities, including Dallas, run twice-a-week watering on assigned days for much of the year, and new sod usually qualifies for a temporary variance for about the first 30 days. In fall you rarely need more than the variance allows. Details are in how Dallas watering rules affect new sod.
The fall catch. Warm-season sod needs roughly four to six weeks of warm soil to root before a freeze, and DFW averages its first freeze in the second half of November. September and early October clear that bar. Late October is tight, and November sod mostly holds in place until spring. See our month-by-month guide to the best time to lay sod.
Winter or dormant install schedule (December through February)
Winter installs are real and we do them. The grass goes down brown, roots slowly on warm days, and greens up in spring. The watering job is not establishment. It is keeping the sod from drying out while it waits.
Days 1 to 7. Water it well once right after it is laid so it settles onto the soil. After that, water once every 2 to 3 days on dry days above freezing. Mornings only.
Days 8 to 14. Once or twice a week if it has been dry. Skip after any rain. Dormant sod that stays soggy rots before it roots.
Weeks 3 and 4. About once a week during dry, windy stretches, and only when the ground is not frozen. Dry January wind pulls moisture out of dormant sod faster than most people expect, and the damage shows up in March as uneven green-up.
After green-up. Late February into March the soil warms and Bermuda and Zoysia wake up. Pick up the normal establishment cadence then: 2 short cycles a day for a couple of weeks, then taper.
Freeze nights: water before, not during
Moist soil holds heat better than dry soil, so watering the morning before a hard freeze protects the roots. What you never do is run the system on the freeze itself. Water on frozen blades turns to ice, ice on the sidewalk is a hazard, and a line that freezes full can split. Water the morning before, skip the day of, resume when the ground thaws.
Brown is not dead
Dormant Bermuda and Zoysia are alive below the surface, still pushing roots into our Houston Black clay on every mild day. The mistake we see most is somebody who sees brown grass in December, shuts the water off until April, and finds dried-out sod with open seams in spring. Keep it on the light winter schedule and it comes back strong.
St. Augustine needs extra care. It is the least cold-tolerant of the three and the most prone to fungus in cool, wet weather, so we push its fall installs earlier, ideally September and no later than early October. Water it on the fall schedule, mornings only, and skip cycles after rain. Round brown patches spreading in a wet October are fungus, not thirst, and more water makes it worse.
Sprinkler run-time math
Spray heads (pop-ups that fan a fixed pattern) typically put down about 1.5 inches per hour. Rotor heads (the ones that sweep back and forth) typically put down about 0.5 inch per hour. Typical run times:
| Goal | Spray heads | Rotor heads |
|---|---|---|
| Light new-sod cycle, about 0.15 inch | 5 to 6 minutes | 15 to 20 minutes |
| Deeper soak, about 0.25 inch | 10 minutes | 30 minutes |
| Established half inch | 20 minutes | 60 minutes |
Those are typical numbers and every system differs. Set a few tuna cans on the lawn, run a zone for 10 minutes, and measure. On Blackland Prairie clay, split longer runs into two bursts a few minutes apart (cycle and soak) so the water soaks in instead of running to the street.
The tug test
At the start of week three, pick a spot in the middle of the yard and one near an edge. Gently pull up on a corner of the sod.
- It resists and feels anchored: roots are in. Start tapering.
- It lifts like a loose rug: not yet. Keep the current schedule another week and check again.
Check several spots, because a shaded corner and a sunny strip root at different speeds.
Get a schedule built for your yard
Every install we do comes with a printed 30-day watering schedule that fits your sprinkler system and the season it went in. Fall is one of the best sod windows of the year in North Texas, and a winter install gets you ahead of the spring rush. Get a free sod estimate or call 469-671-8467 for a straight answer on timing and a schedule that matches the weather you will actually have.
This article is part of The Complete Guide to Sod Installation in DFW.
