Weeds in 3-Week-Old Sod: Post-Emergent Timing in Summer Heat

New sod (3 weeks) in New Mexico. Steady watering brought weeds from old soil. Can we apply herbicide now in hottest months? What's safe for new sod?

Prep Before Spraying

• Confirm sod is rooted (tug test).
• Choose post-emergent labeled for your sod grass and the weeds present.
• Verify label allows application at current temps (many >85°F restrict use).
• Apply early morning—max leaf absorption, min evaporation.

Water Management Trick

Pre-load soil: irrigate deeply to carry sod through 14 days. Then skip watering 24 hrs before/after herbicide to avoid wash-off. Resume deep, infrequent schedule.

Expect Some Injury

New sod is tender. Spot-treat only heavy weed patches. Accept minor yellowing—better than weed competition.

Heat + new sod + herbicide = tightrope. Walk it with label precision.