St Paul Island Airport, AK Lawn Care Calendar

Every timing-sensitive lawn job in St Paul Island Airport, timed to the local climate record — not a national average.

Turf region
Cool-season
Kentucky bluegrass, tall fescue, perennial ryegrass, fine fescue
Last spring frost
Jun 4
median, 1991–2020
First fall frost
Sep 28
median, 1991–2020
Growing stretch
116 days
frost to frost
TaskSt Paul Island Airport windowWhy then
Crabgrass pre-emergent May 14 – Jun 4 Soil nearing 55°F — must beat germination
Light spring feeding Jun 4 – Jul 2 After green-up, before summer stress
Aerate + overseed Jul 30 – Aug 14 Fall growth surge; established before cold
Main fall feeding Aug 3 – Aug 31 The year’s most important nitrogen
Winterizer feeding Aug 31 – Sep 14 Root reserves for spring green-up
Final mow Sep 21 – Oct 12 Growth stops around first frost

Anchored to NOAA 1991–2020 climate normals at the ST PAUL ISLAND AP station. Windows are estimates — soil temperature is the real trigger, especially for pre-emergent. Check your own ZIP with the lawn calendar lookup.

St Paul Island Airport lawn care, month by month

MonthTasks
January Dormant — keep leaves cleared, stay off frozen turf
February Dormant — keep leaves cleared, stay off frozen turf
March Dormant — keep leaves cleared, stay off frozen turf
April Dormant — keep leaves cleared, stay off frozen turf
May Apply crabgrass pre-emergent
June Apply crabgrass pre-emergent · Light feeding after green-up
July Light feeding after green-up · Aerate + overseed
August Aerate + overseed · Main fall feeding · Winterizer feeding
September Winterizer feeding · Final mow of the year
October Final mow of the year
November Dormant — keep leaves cleared, stay off frozen turf
December Dormant — keep leaves cleared, stay off frozen turf

Reading the St Paul Island Airport lawn year

St Paul Island Airport runs on the classic northern rhythm: a short, important spring (pre-emergent before soil hits 55°F, one light feeding), a defensive summer (mow tall, water deep, feed nothing), and then the season that actually builds a lawn — early fall, when aeration, overseeding around Jul 30 – Aug 14, and the year's main feeding all land before the Sep 28 frost closes the year. With only ~116 frost-free days, the fall window is tight — miss it and the next real chance is spring.

Grasses that fit St Paul Island Airport

Frequently asked questions

When should I overseed my lawn in St Paul Island Airport?

For cool-season grass (bluegrass, fescue, ryegrass), overseed in early fall — in St Paul Island Airport that means roughly Jul 30 – Aug 14, timed 45–60 days before the average first fall frost (Sep 28) so seedlings establish before cold. Spring works as a backup but collides with crabgrass season.

When do I put down crabgrass preventer in St Paul Island Airport?

Aim for May 14 – Jun 4 — the estimated stretch when St Paul Island Airport soil approaches the ~55°F germination threshold, anchored to the average last frost (Jun 4). It's an estimate: a soil thermometer reading 50–55°F at 2″ depth for several days is the precise trigger, and pre-emergent must go down before crabgrass sprouts, not after.

When should I stop mowing in St Paul Island Airport?

Keep mowing as long as the grass grows — in St Paul Island Airport that's typically until Sep 21 – Oct 12, around the average first fall frost (Sep 28). Take the final cut slightly shorter to discourage snow mold.

What grass grows best in St Paul Island Airport?

Alaska is cool-season country: Kentucky bluegrass, tall fescue, perennial ryegrass, fine fescue. See the grass guides linked below for identification and care.