Preparing your Oklahoma lawn for winter involves fall fertilization, continued mowing until growth stops, thorough leaf removal, irrigation system winterization, and a final weed control application. The work you do in October and November determines how quickly and vigorously your lawn recovers in spring. Complete Lawn Care has been preparing Tulsa-area lawns for winter for 25 years, and proper fall care makes a significant difference in spring results.
Fall Fertilization
For Bermuda/Zoysia: Apply a fall fertilizer with potassium (the third number on the bag) in September or early October. This strengthens roots and improves cold tolerance. Don’t fertilize after mid-October, as dormant grass can’t use nutrients.
For Fescue: Fall is a critical fertilization time. Apply in September and again in November. This builds root reserves that help fescue survive next summer’s heat.
Keep Mowing Until Growth Stops
Continue regular mowing as long as grass is growing. Don’t stop just because temperatures cool. For the season’s final mow, maintain normal height (don’t scalp). Leaving grass too long promotes snow mold and disease; cutting too short weakens the plant going into dormancy.
Leaf Removal Is Critical
Never let leaves pile up on your lawn over winter. A thick layer blocks sunlight, traps moisture, and promotes disease. It can kill grass underneath. Remove or mulch leaves regularly through fall. If you mulch with a mower, ensure pieces are small enough to filter down to the soil.
Winterize Irrigation System
When to winterize: Before the first hard freeze, typically early to mid-November in the Tulsa area.
What’s involved: Blow out all water from lines with compressed air to prevent pipe freeze damage. Turn off the water supply to the system.
Professional service: Complete Lawn Care offers irrigation winterization. Improper blow-out can leave water in lines that freezes and cracks pipes.
Fall Pre-Emergent for Winter Weeds
A fall pre-emergent application prevents winter annual weeds like henbit, chickweed, and annual bluegrass from establishing. These weeds germinate in fall, survive winter, and become problems in early spring. Prevention is easier than treatment.
Aeration and Overseeding (Fescue Only)
For fescue lawns, September through early October is ideal for core aeration and overseeding. This repairs summer damage, thickens the lawn, and gives new grass time to establish before winter. Do not aerate Bermuda or Zoysia in fall; save that for late spring.
Winter Prep Checklist
September: Fall fertilizer. Aerate/overseed fescue.
October: Fall pre-emergent. Continue mowing. Begin leaf removal.
Early November: Final fertilizer for fescue. Winterize irrigation. Final mowing.
Late November: Final leaf cleanup. Store lawn equipment properly.
Complete Lawn Care: 25 Years of Winter Prep
For a quarter century, Complete Lawn Care has helped Tulsa homeowners prepare their lawns for winter. Our 7-step program includes fall fertilization and pre-emergent applications timed perfectly for Oklahoma conditions. We also offer irrigation winterization, fall cleanup, and aeration services. Let our experience ensure your lawn enters winter strong and emerges healthy in spring.
Contact Complete Lawn. Care:
Phone: (918) 605-4646 | Email: [email protected] | Online: completelawncaretulsa.com/get-a-quote