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Soil temp Timing Seed scores
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Overseeding
Thicken an existing tall fescue lawn. Best in fall when soil temps settle into the seeding band.
Timing An afternoon
Primary window · soil unchecked
Primary window is fall. Soil temperature matters more than the calendar date.
Soil gate: Soil temp unknown — Using calendar windows only
Why
Maintains density so summer stress and weeds have less room.
Steps
- Confirm soil temperature is in the seeding band (see live conditions).
- Aerating first dramatically improves results.
- Spread seed evenly at overseed rate.
- Light peat or compost topdress for contact.
- Keep seedbed consistently moist until established.
What you need
Equipment
- Broadcast spreader
Buy before you start
- Tall fescue blend (Calypsow or Resilience II)
- Peat or compost topdress (optional)
How much
Apply about 25.0 lb across 5,000 sq ft (5 lb / 1000).
Typical overseed rate. New lawn from bare soil is higher.
Edited rates save in this browser for next time.
Comes after
Caveats
- Soil temperature beats calendar date for germination success.
- Spring overseed is secondary — summer heat arrives faster.