4B
Zone 4B Lawn Calendar
Monthly seeding windows, overseeding periods, and fertilizing schedules for cold continental Zone 4B.
137 counties · 12 states · -25° to -20°F
Monthly Activity Timeline
January
winter
Maintenance
February
winter
Maintenance
March
spring
Maintenance
April
spring
Cool-season seeding
MayNow
spring
Cool-season seeding
Spring fertilize
June
summer
Maintenance
July
summer
Maintenance
August
summer
Fall seeding
September
fall
Fall seeding
Overseeding
Fall fertilize
October
fall
Maintenance
November
fall
Maintenance
December
winter
Maintenance
Legend
Cool-season seeding
Fall seeding
Warm-season seeding
Overseeding
Spring fertilize
Fall fertilize