🌱 Grass Seed Calculator

Cool-Season Grasses thrive in northern temperate climates, optimal growth at 15-25°C (60-77°F), most active in spring and fall:

• Kentucky Bluegrass: Fine texture, deep green color, excellent cold tolerance, slower establishment (14-21 days germination)
• Tall Fescue: Drought and heat tolerant, deep roots, great for low-maintenance lawns, 7-12 day germination
• Perennial Ryegrass: Fastest germination (5-10 days), often used for quick establishment and blends
• Fine Fescue: Shade tolerant, ideal under trees, low fertilizer requirements

Warm-Season Grasses thrive in southern subtropical climates, optimal growth at 25-35°C (77-95°F), most active in summer:

• Bermuda Grass: Drought and wear tolerant, excellent recovery, common on sports fields, needs full sun
• Zoysia: Dense growth, wear resistant, slow spreading but excellent texture
• St. Augustine: Salt and shade tolerant, great for coastal areas, higher fertilizer needs
• Buffalo Grass: Extremely drought tolerant, native to North American plains, top low-maintenance choice

Q: How much area does one pound of grass seed cover?

A: It depends on the grass type. Kentucky Bluegrass covers about 500 ft²/lb, Tall Fescue about 167 ft²/lb, and Bermuda Grass about 1000 ft²/lb. See the calculator results for exact figures.

Q: How much seed do I need for overseeding?

A: Overseeding typically uses half the rate of a new lawn. If your lawn is just thinning rather than bare, you can even use as little as one-third of the new lawn rate.

Q: When is the best time to plant grass seed?

A: For cool-season grasses, early fall (Sep-Oct) is ideal — the soil is still warm and weed competition is low. For warm-season grasses, late spring (May-Jun) is best when soil temperatures stay above 18°C (65°F).

Q: Why do I need a waste factor?

A: Some seed gets eaten by birds, blown away by wind, or lost to uneven watering. A 10% waste factor is a standard recommendation. For large areas or windy conditions, you may want to increase it.