Crabgrass in 2-Week Bermuda Sod: Tilling Woke the Seed Bank

Bermuda 419 sod 2 weeks. Crabgrass up. Old lawn: Bermuda/fescue/crabgrass. Pre-emerged March, Roundup 2 weeks pre-sod, then tilled. Why crabgrass now?

Source Check

• If crabgrass in seams → from below (tilling germinated buried seed).
• If in sod pieces → from sod farm (complain).

Tilling = Germination Trigger

You tilled → brought seeds up → they sprouted. Should have: watered to germinate, then 2nd Roundup, then sod.

Fix

• Commercial service for selective crabgrass control in Bermuda (quinclorac, etc.).
• Or accept some, treat in fall.

Tilling without follow-up kill = weed crop. Learn for next time.