Quick answer
Bermuda greens up once soil temperatures warm in spring, usually from around April into May in central Oklahoma. The exact timing changes each year with the weather, and shaded or compacted spots green up last.
What Affects Green-Up
- Soil temperature, more than air temperature
- Late cold snaps that set growth back
- Shade from trees and buildings
- Compacted or poorly drained soil
How to Help It Along
Remove dead dormant growth with a low first mow once green-up starts, so sunlight reaches the soil. Hold off on fertilizer until the lawn is actively growing.
If It Stays Brown
If parts of the lawn are still brown well after the rest has greened up, check for winterkill, grubs, or compaction in those spots.