🌱 Grass Seed Calculator
Calculate exactly how much grass seed you need for new lawns, overseeding, or patching bare spots. Get accurate coverage rates for different grass types.
Common Lawn Sizes
Calculate Grass Seed Needs
Average: $3-$8 per pound
Common sizes: 3, 5, 10, 20, 50 lbs
Grass Seed Coverage Rates
| Grass Type | New Lawn | Overseeding | Patch Repair |
|---|---|---|---|
| Kentucky Bluegrass | 3 lbs/1000 sq ft | 1.5 lbs/1000 sq ft | 4 lbs/1000 sq ft |
| Perennial Ryegrass | 8 lbs/1000 sq ft | 4 lbs/1000 sq ft | 10 lbs/1000 sq ft |
| Tall Fescue | 8 lbs/1000 sq ft | 4 lbs/1000 sq ft | 10 lbs/1000 sq ft |
| Bermuda Grass | 1.5 lbs/1000 sq ft | 1 lb/1000 sq ft | 2 lbs/1000 sq ft |
| Mixed Seed Blend | 5 lbs/1000 sq ft | 2.5 lbs/1000 sq ft | 6 lbs/1000 sq ft |
Frequently Asked Questions
How much grass seed do I need for 1000 square feet?
For new lawns: Kentucky Bluegrass needs 3 lbs, Tall Fescue or Perennial Ryegrass needs 8 lbs, and Bermuda needs 1.5 lbs per 1000 sq ft. For overseeding, use half these rates. Always check your specific seed variety as rates can vary by cultivar.
What is the difference between new lawn seeding and overseeding rates?
New lawn seeding requires 2x more seed than overseeding because you are starting with bare soil. Overseeding fills in thin areas of existing grass, so you need less seed. Patch repair uses even more seed to quickly establish dense coverage in bare spots.
When is the best time to plant grass seed?
Cool-season grasses (Kentucky Bluegrass, Fescue, Ryegrass): Early fall (September) or spring (April-May). Warm-season grasses (Bermuda, Zoysia): Late spring to early summer (May-June) when soil temperatures reach 65-70°F.
How long does it take for grass seed to germinate?
Germination times vary by grass type: Perennial Ryegrass 5-10 days, Tall Fescue 7-14 days, Kentucky Bluegrass 14-30 days, Bermuda 10-30 days. Keep soil consistently moist during germination. Full establishment takes 8-10 weeks.