Winter Lawn Watering in Fort Worth: How Much Is Enough

In winter, warm-season lawns in Fort Worth go dormant. The grass turns tan or brown, stops growing and needs only a small fraction of the water it used in summer. Yet many sprinkler systems keep running on their summer schedule well into winter. That wastes water, can encourage disease and weeds, and risks ice on walks during cold mornings. This article explains how much water a dormant lawn needs and how to adjust your system for winter.

What Dormancy Means

St. Augustine, Bermuda and zoysia are warm-season grasses. When temperatures drop in late fall, they slow down and go dormant. The roots are still alive, but the plant is resting. It uses very little water because it is not growing and temperatures are low, so less water evaporates from the soil.

Dormant grass is not dead grass. It will green up again in spring as temperatures rise.

How Much Water Does a Dormant Lawn Need?

Much less than you might think. In a typical Fort Worth winter, rain often provides enough. During a dry winter, a light watering every few weeks is usually plenty to keep roots from drying out completely. The goal is to keep the soil from becoming bone-dry, not to keep it moist.

Signs the lawn needs a drink:

• Several weeks without meaningful rain
• Soil that is hard and dry several inches down
• Strong, dry winds for several days
• A newly installed lawn that has not had time to root in

Why Overwatering in Winter Causes Problems

• Fungal disease. Cool, wet conditions can encourage certain lawn diseases, especially in St. Augustine.
• Weeds. Winter weeds grow in cool, moist soil while the grass is dormant.
• Ice. Water on sidewalks, driveways and streets can freeze on cold mornings.
• Wasted water and money.
• Soggy clay. Saturated clay soils compact easily when walked on.

Adjusting Your Controller

You have several options:

1. Turn the seasonal adjust down sharply, so each zone runs much shorter.
2. Set the controller to off and run a manual cycle when the lawn needs it.
3. Use a rain delay after winter rain.
4. Use a smart controller that adjusts for weather. Our article on smart sprinkler controllers explains how they work.

Whatever you choose, Fort Worth’s twice-a-week schedule and the 10 a.m. to 6 p.m. restriction still apply in winter. Our guide to Fort Worth’s watering schedule covers the rules.

Watering Time of Day in Winter

In winter, early morning watering carries a freeze risk on cold days. If a freeze is possible overnight or in the early morning, skip the cycle. A working freeze sensor will stop the system automatically; see our article on rain and freeze sensors. On mild days, evening watering after 6 p.m. is allowed, but grass that stays wet overnight in cool weather is more prone to disease, so late morning before 10 a.m. on a mild day is often the best choice.

Hand Watering in Winter

If you have shut your system down for the winter, you can hand water with a hose if the lawn or plants need it. Fort Worth allows hand watering at any time. This is a simple way to give new plantings, trees or a dry area a drink without running the whole system. Our article on hand watering, drip and soaker hoses explains the rules.

Trees and Shrubs in Winter

Trees and shrubs, especially evergreens and those planted in the last year or two, can suffer during long dry winters. Water them deeply every few weeks if there has been no rain. Drip lines and soaker hoses are allowed at any time under Fort Worth’s rules.

Cool-Season Overseeding

Some homeowners overseed Bermuda lawns with ryegrass for winter color. Overseeded lawns do need more water than dormant ones, especially while the seed germinates. If you overseed, plan for more frequent light watering in fall, within your assigned days, and expect to adjust as the ryegrass establishes.

Protecting the System

Winter watering decisions go hand in hand with freeze protection. Protect the backflow preventer before hard freezes and consider shutting the system down for the coldest weeks. Our guide to winterizing a sprinkler system covers both approaches.

Getting Ready for Spring

As the lawn begins to green up in spring, gradually increase run times. Do not jump straight to summer settings. Our guide on turning your system back on in spring walks through a safe startup.

Signs You Are Watering Too Much in Winter

• Soggy spots that never dry out
• Moss, algae or mushrooms in the lawn
• Winter weeds spreading quickly
• Ice on walks after a cold morning cycle
• Higher water bills than you expect for the season

New Sod and Seed in Fall

If you laid new sod or seeded late in the season, it needs more water than an established lawn until it roots in, even as temperatures drop. Check the soil under a corner of the new sod; it should be moist, not soggy. Hand watering is allowed at any time under Fort Worth’s rules, which makes it easy to keep new sod alive without running the whole system extra days.

When to Call a Technician

If your system runs too much in winter and you cannot get the controller to cooperate, or you want help setting up a winter schedule, our sprinkler repair service can help.