Pullman Moscow Regional Airport, WA Lawn Care Calendar

Every timing-sensitive lawn job in Pullman Moscow Regional 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
Apr 29
median, 1991–2020
First fall frost
Oct 2
median, 1991–2020
Growing stretch
156 days
frost to frost
TaskPullman Moscow Regional Airport windowWhy then
Crabgrass pre-emergent Apr 8 – Apr 29 Soil nearing 55°F — must beat germination
Light spring feeding Apr 29 – May 27 After green-up, before summer stress
Aerate + overseed Aug 3 – Aug 18 Fall growth surge; established before cold
Main fall feeding Aug 7 – Sep 4 The year’s most important nitrogen
Winterizer feeding Sep 4 – Sep 18 Root reserves for spring green-up
Final mow Sep 25 – Oct 16 Growth stops around first frost

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

Pullman Moscow Regional 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 Apply crabgrass pre-emergent · Light feeding after green-up
May Light feeding after green-up
June Mow high (3–3.5″); water deeply in dry spells; no feeding in heat
July Mow high (3–3.5″); water deeply in dry spells; no feeding in heat
August Aerate + overseed · Main fall feeding
September Main fall feeding · 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 Pullman Moscow Regional Airport lawn year

Pullman Moscow Regional 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 Aug 3 – Aug 18, and the year's main feeding all land before the Oct 2 frost closes the year.

Grasses that fit Pullman Moscow Regional Airport

Frequently asked questions

When should I overseed my lawn in Pullman Moscow Regional Airport?

For cool-season grass (bluegrass, fescue, ryegrass), overseed in early fall — in Pullman Moscow Regional Airport that means roughly Aug 3 – Aug 18, timed 45–60 days before the average first fall frost (Oct 2) so seedlings establish before cold. Spring works as a backup but collides with crabgrass season.

When do I put down crabgrass preventer in Pullman Moscow Regional Airport?

Aim for Apr 8 – Apr 29 — the estimated stretch when Pullman Moscow Regional Airport soil approaches the ~55°F germination threshold, anchored to the average last frost (Apr 29). 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 Pullman Moscow Regional Airport?

Keep mowing as long as the grass grows — in Pullman Moscow Regional Airport that's typically until Sep 25 – Oct 16, around the average first fall frost (Oct 2). Take the final cut slightly shorter to discourage snow mold.

What grass grows best in Pullman Moscow Regional Airport?

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