Garden Guide
How Much Grass Seed Do I Need?
Grass seed rates depend on lawn area, seed type, and whether the job is a new lawn or overseeding.
Table of Contents
Typical Seed Rates
Always check your seed label first. If you do not have it yet, these planning rates are useful starting points. The Lawn Seed Calculator can convert your square footage into pounds.
| Grass type | New lawn | Overseeding |
|---|---|---|
| Tall fescue | 6 to 8 lb per 1,000 sq ft | 3 to 4 lb per 1,000 sq ft |
| Kentucky bluegrass | 2 to 3 lb per 1,000 sq ft | 1 to 2 lb per 1,000 sq ft |
| Perennial ryegrass | 5 to 10 lb per 1,000 sq ft | 3 to 5 lb per 1,000 sq ft |
| Bermudagrass | 1 to 2 lb per 1,000 sq ft | 0.5 to 1 lb per 1,000 sq ft |
Example
For 2,500 square feet of tall fescue at 7 lb per 1,000 square feet: 2.5 x 7 = 17.5 lb. Buy an 18 to 20 lb amount so you have a little extra for edges and thin spots.
Measure Before Buying
- Break the lawn into rectangles and add the areas.
- Subtract patios, sheds, and large beds.
- Round up slightly for spreader overlap.
- Use the lower overseeding rate if the lawn is already dense.
FAQ
How Much Grass Seed Do I Need? FAQ
How do I calculate grass seed?
Divide lawn square footage by 1,000, then multiply by the seed rate on the label.
Do I need more seed for a new lawn?
Yes. New lawns usually need about twice the overseeding rate because bare soil needs full coverage.
Can I put down too much grass seed?
Yes. Too much seed causes crowded seedlings, weak roots, and disease risk.
Should I buy extra grass seed?
A small extra amount is useful for edges and washouts, but do not heavily exceed the label rate.
What if my lawn is irregular?
Estimate it in smaller rectangles or use total square footage from a lawn measuring tool, then calculate seed from that area.
Which calculator should I use?
Use the Lawn Seed Calculator for new lawn, overseeding, and patch estimates.