Overseeding in Heat: 90°F After Aeration/Seeding—Wait and Watch

The Concern

Albany, NY. Pro company aerated/overseeded post-Labor Day. 90°F for several days. Watered 2×/day + rain. Little visible germination after 1 week.

Assessment

90°F for a few days is stressful but rarely fatal to cool-season seed. Pros likely used heat-tolerant varieties. Seed may germinate slower but will catch up.

Recommendation

• Continue daily watering if no rain.
• Wait 1 more week.
• If no grass by then, call company—they'll likely honor warranty.
• Don't demand re-seed prematurely; original work may be fine.

Perspective

100°F for a week = different story. 90°F for a few days = normal seasonal variation. Patience pays.