When Is the Best Time to Plant Grass Seed?
Plant cool-season grasses (tall fescue, Kentucky bluegrass, ryegrass, fine fescue) from late summer to early fall, with spring as a second choice. Plant warm-season grasses (Bermuda, zoysia, bahia, centipede) in late spring to early summer, once soil is warm.
| Grass group | Grasses | Best seeding window | Where it’s used |
|---|---|---|---|
| Cool-season | Tall fescue, Kentucky bluegrass, perennial ryegrass, fine fescue | Late Aug–Oct (spring second) | North, Midwest, Northeast, mountains, transition zone |
| Warm-season | Bermudagrass, zoysia, bahiagrass, centipede | Late Apr–June | South, Gulf Coast, Southwest |
Why fall works for cool-season grass
Warm soil speeds germination while cooler air reduces stress on seedlings, and weeds are winding down. Seedlings then have fall and the following spring to build roots before summer heat.
Why warm-season grass waits
Warm-season seed needs warm soil to sprout and a long hot season to establish before the first frost. Seeding too early means slow, patchy germination.
After seeding
- Keep the top inch of soil moist — light watering once or twice a day — until seedlings are established.
- Mow when new grass reaches the top of its normal mowing height.
- Hold off on most weed killers until the new lawn has been mowed several times; read the label.
Work out how much seed to buy with the grass seed calculator.