Davenport, WA Lawn Care Calendar

Every timing-sensitive lawn job in Davenport, 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 6
median, 1991–2020
First fall frost
Sep 11
median, 1991–2020
Growing stretch
97 days
frost to frost
TaskDavenport windowWhy then
Crabgrass pre-emergent May 16 – Jun 6 Soil nearing 55°F — must beat germination
Light spring feeding Jun 6 – Jul 4 After green-up, before summer stress
Aerate + overseed Jul 13 – Jul 28 Fall growth surge; established before cold
Main fall feeding Jul 17 – Aug 14 The year’s most important nitrogen
Winterizer feeding Aug 14 – Aug 28 Root reserves for spring green-up
Final mow Sep 4 – Sep 25 Growth stops around first frost

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

Davenport 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 · Main fall feeding
August Main fall feeding · Winterizer feeding
September Final mow of the year
October Dormant — keep leaves cleared, stay off frozen turf
November Dormant — keep leaves cleared, stay off frozen turf
December Dormant — keep leaves cleared, stay off frozen turf

Reading the Davenport lawn year

Davenport 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 13 – Jul 28, and the year's main feeding all land before the Sep 11 frost closes the year. With only ~97 frost-free days, the fall window is tight — miss it and the next real chance is spring.

Grasses that fit Davenport

Frequently asked questions

When should I overseed my lawn in Davenport?

For cool-season grass (bluegrass, fescue, ryegrass), overseed in early fall — in Davenport that means roughly Jul 13 – Jul 28, timed 45–60 days before the average first fall frost (Sep 11) so seedlings establish before cold. Spring works as a backup but collides with crabgrass season.

When do I put down crabgrass preventer in Davenport?

Aim for May 16 – Jun 6 — the estimated stretch when Davenport soil approaches the ~55°F germination threshold, anchored to the average last frost (Jun 6). 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 Davenport?

Keep mowing as long as the grass grows — in Davenport that's typically until Sep 4 – Sep 25, around the average first fall frost (Sep 11). Take the final cut slightly shorter to discourage snow mold.

What grass grows best in Davenport?

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