Seeding After Scotts SummerGuard: Residual Herbicide Risks

A homeowner applied Scotts SummerGuard and wants to seed immediately.

Risk Assessment

SummerGuard products contain pre-emergent herbicides (some with 2,4-D). These persist in soil and can:

• Reduce germination rates.
• Weaken or kill emerging seedlings.
• Cause patchy, thin establishment.

Recommendation

• Proceed with seeding but expect reduced success.
• Overseed heavily to compensate.
• Water consistently to dilute herbicide near surface.
• Best practice: Wait until herbicide degrades (check label for reseeding interval, often 4–12 weeks).

If possible, delay seeding. If not, accept thinner results and plan a follow-up overseeding.