Know Your Grass

Every date on this site β€” overseeding, feeding, aeration β€” depends on whether your lawn is cool-season or warm-season. Two minutes here settles it.

The 10-second test: a lawn that stays green through winter and struggles in July heat is cool-season; one that turns uniformly brown after the first frost and thrives in August is warm-season.

Cool-season grasses grow hardest in spring and fall, slow down in summer heat, and stay green late into fall. The year’s biggest project β€” aeration and overseeding β€” belongs in early fall, and the most important feeding does too.

Warm-season grasses wake up after the last frost, peak in midsummer heat, and go dormant (brown, not dead) after the first fall frost. Almost everything β€” seeding, feeding, aerating β€” happens from late spring through midsummer.

Quick comparison

GrassFamilyMow heightN / yearNew-lawn seed rate
Kentucky Bluegrass Cool 2.5–3.5β€³ 2–4 lb 2–3 lb / 1,000 sq ft
Tall Fescue Cool 3–4β€³ 2–3 lb 8–10 lb / 1,000 sq ft
Perennial Ryegrass Cool 2–3β€³ 2–3 lb 6–9 lb / 1,000 sq ft
Fine Fescue Cool 2.5–4β€³ 1–2 lb 4–5 lb / 1,000 sq ft
Bermudagrass Warm 1–2β€³ 2–4 lb 1–2 lb / 1,000 sq ft
Zoysiagrass Warm 1–2.5β€³ 1.5–3 lb 1–2 lb / 1,000 sq ft
St. Augustine Warm 2.5–4β€³ 2–4 lb Sod / plugs only
Centipedegrass Warm 1–2β€³ 0.5–1 lb 0.25–0.5 lb / 1,000 sq ft
Buffalograss Warm 2–3β€³ 0.5–1.5 lb 1–2 lb / 1,000 sq ft
Bahiagrass Warm 3–4β€³ 1–3 lb 5–10 lb / 1,000 sq ft

Once you know your grass, get its local schedule from the lawn calendar lookup, and its quantities from the seed and fertilizer calculators.