| City | Aerate + overseed | Pre-emergent | Season |
|---|
| Anchorage | Jul 31 – Aug 15 | Apr 10 – May 1 | 151 days |
| Fairbanks | Jul 8 – Jul 23 | Apr 25 – May 16 | 113 days |
| Juneau | Aug 23 – Sep 7 | Mar 30 – Apr 20 | 185 days |
All Alaska station records (160)
Every NOAA weather station in Alaska with complete 1991–2020 frost normals — pick
the one nearest you (similar elevation matters more than plain distance).
Not sure which station to trust? Use the
ZIP code lookup
for the quick answer, or pick the station whose terrain most resembles your yard.
Lawn timing geography of Alaska
Across the 163 Alaska locations with complete 1991–2020 frost
normals, the average last spring frost — the anchor for pre-emergent and spring
work — ranges from Apr 4 (Annette Island Airport) to Jun 12
(Cooper Landing 5 W), a spread of about 10 weeks driven by elevation, latitude, and terrain.
The same job can be weeks apart at opposite ends of the state, which is why a
state-level date is only a starting point — pick the location nearest your yard and
plan from its calendar.
The Alaska lawn year in one paragraph
Spring in Alaska is for prevention and restraint: crabgrass pre-emergent as soil approaches 55°F, one light feeding after green-up, and otherwise letting the lawn grow. Summer is defense — mow tall, water deeply or let it go dormant. Early fall is when lawns are actually built here: aerate, overseed, and give the main feeding while warm soil and cool air do the establishment work, then a winterizer feeding and a final mow around first frost close the year. Details by task: when to overseed in Alaska, when to aerate in Alaska, when to apply crabgrass pre-emergent in Alaska, and more above.