Not all turf species can be established from seed. Germination of grass
seed depends on temperature, moisture, and day-length conditions.
All cool-season grasses can be started from seed. These grasses grow
best if seeded in September and October. The next best time to seed cool-season
grasses is March - April.
Many warm-season species must be established by a method other than
by seed. However, those that can be established by seed are seeded most
successfully from mid-April to mid-May.