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When to Plant Grass Seed

The choice of grass seed—warm or cool season—depends on your location and the seeding’s purpose. While grass seed can be planted year-round, fall is ideal for cool season grasses like tall fescue, ryegrass or Kentucky bluegrass, and spring for warm season varieties like bermuda grass, zoysia or St. Augustine (though St. Augustine doesn’t come in seed form). Learn how to effectively plant grass seed at various times below.

How to Plant Grass Seed in the Fall

Planted Grass Seed In Fall Lawn Close Up Leaves

Cool Season Grass Seed

Fall is optimal for seeding or overseeding cool season grass nationwide. In areas above the transition zone, seed between August 15th and October 1st. Closer to the transition zone, extend seeding from Labor Day to the end of October.

Seeding during these periods ensures proper germination and less weed competition, thanks to upcoming frosts. This advice applies to both new lawns and overseeding warm season grasses, like bermuda, with cool season varieties for winter greenness.

Warm Season Grass Seed

Fall is unsuitable for planting warm season grass seed due to limited germination time before winter, risking weakness and potential winter damage.

How to Plant Grass Seed in the Winter

Planted Grass Seed In Winter Lawn Close Up Snow Covered Grass

Planting grass seed in winter is discouraged for both warm and cool season varieties due to low survival rates. Spring and fall offer the best chances for successful seeding.

How to Plant Grass Seed in the Spring

Planted Grass Seed In Spring Lawn Close Up Sunshine

Cool Season Grass Seed

Spring ranks second for planting cool season grass seed, ideally between April 1st and May 15th, to ensure germination before the cold of March in northern areas. Expect higher weed competition, notably from crabgrass, and avoid overseeding warm season grasses with cool season varieties in spring.

Warm Season Grass Seed

Spring, particularly May, is ideal for planting warm season grass seeds in northern regions like Georgia or North Carolina, with a broader planting window further south. Proper irrigation is important for germination before summer heat. Centipede grass, a favored variety, should be planted in May for optimal growth before the peak summer months.

How to Plant Grass Seed in the Summer

Planted Grass Seed In Summer Close Up Lawn

Cool Season Grass Seed

Planting cool season grass seed during June to early August is not advised due to dormancy, making it ineffective unless in far northern regions.

Warm Season Grass Seed

Summer planting of warm season grass seed is not ideal due to extreme heat and the high costs and effort required for irrigation.

What do I do after planting grass seed?

Post-seeding, use a phosphorus-rich fertilizer like Lawnifi’s® New Lawn Starter Box, with the first applications aimed at root growth. Start with half a bottle on damp soil, then water daily to 1 inch for 10–20 days, accounting for rain. Follow the Starter Box schedule until the first mow, then switch to bi-weekly deep watering, eventually transitioning to a standard maintenance routine for your grass type.

When is the best time to plant grass seed? – Answered

Grass seed can be planted year-round, but fall is optimal for cool season grass and spring for warm season varieties. Winter planting is discouraged for both due to the risk of seed loss and frost damage. Warm season grass can be seeded in summer, though it requires significant irrigation. Seeding cool season grass in summer is not advised due to likely dormancy.

Lawnifi Santee Centipede Seed

$77.95$749.95

Santee Centipede Grass Seed is an enhanced warm season grass variety known for rapid establishment and a strong root system, offering resilience to damage and consistent color through seasons.

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