Quick answer
Winterize before the first hard freeze, typically late fall in central Oklahoma. Bermuda is dormant by then and needs little water.
Why It Matters
Water left in pipes, valves, and the backflow preventer can freeze and crack. The backflow device above ground is especially vulnerable.
The Basics
- Turn off the water supply to the system
- Set the controller to off or rain mode
- Drain or blow out lines depending on the system
- Insulate the backflow preventer
Winter Watering
During long dry spells in winter, a lawn may benefit from occasional watering on a warm day. Plan for this before fully shutting down.