Grass seed typically takes between 5 and 30 days to germinate, depending on the type of grass, weather conditions, and soil preparation. Most common grass seeds, such as ryegrass and fescue, germinate within 5 to 14 days, while some like Kentucky bluegrass can take up to 30 days

. Optimal germination occurs when soil temperatures are warm enough-generally above 7-8°C (45-50°F)-and moisture is consistently maintained. Early autumn and mid-spring are ideal times to sow grass seed because the soil is warm and moist, and the weather is moderate

. Here is a summary of germination times by grass type:

Grass Type| Germination Time
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Perennial Ryegrass| 5 to 10 days
Annual Ryegrass| 7 to 10 days
Fine Fescues| 5 to 14 days
Tall Fescue| 7 to 14 days
Bentgrass| 7 to 14 days
Kentucky Bluegrass| 10 to 30 days
Bermudagrass (warm-season)| 10 to 30 days
Zoysiagrass (warm-season)| 14 to 21 days

Maintaining consistent soil moisture and avoiding extreme temperatures or drought is critical for successful germination. After seeds sprout, grass typically grows about 2/3 cm per week

. In summary, expect to see grass seedlings emerge within about 7 to 14 days under good conditions, but some varieties and climates may require up to 30 days for germination