Fall Seeding Timeline for Tall Fescue/Bluegrass in Zone 7b

Optimal Window

Early to late September. Soil temperatures (60–75°F) support rapid germination. Roots establish before winter.

Absolute Deadline

First week of October *only if* fall stays warm. Later seeding risks poor establishment and winter injury.

Fertilization Schedule

• Mid-September: Starter fertilizer at seeding (high phosphorus).
• Mid-November (after frost, before hard freeze): Winterizer/high-nitrogen fertilizer. Builds crown/root reserves for spring green-up.

Aeration Timing

Early September—before or at seeding. Improves seed-to-soil contact and root penetration.

Key Principle

Seed early, fertilize late. The late fall feeding is the most important for long-term turf health.