Lawn Overseeding Calculator
Overseeding Calculator
Calculate seed needed for overseeding an existing lawn
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Formula
Seed (lbs) = (Lawn Area / 1000) × Seeding Rate × Condition Modifier
Frequently Asked Questions
When is the best time to overseed a lawn?
Cool-season grasses (fescue, bluegrass, ryegrass): early fall (August-September). Warm-season grasses (bermuda, zoysia): late spring to early summer. Soil temperature should be 50-65°F for cool-season and 65-70°F for warm-season.
Should I aerate before overseeding?
Yes, core aeration before overseeding dramatically improves seed-to-soil contact and germination rates. The aeration holes provide ideal spots for seeds to establish.
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