Seattle Tacoma International Airport lawn care, month by month
| Month | Tasks |
|---|---|
| January | Dormant — keep leaves cleared, stay off frozen turf |
| February | Apply crabgrass pre-emergent |
| March | Apply crabgrass pre-emergent · Light feeding after green-up |
| April | Mow high (3–3.5″); water deeply in dry spells; no feeding in heat |
| May | Mow high (3–3.5″); water deeply in dry spells; no feeding in heat |
| 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 | Mow high (3–3.5″); water deeply in dry spells; no feeding in heat |
| September | Aerate + overseed · Main fall feeding |
| October | Aerate + overseed · Main fall feeding · Winterizer feeding |
| November | Winterizer feeding · Final mow of the year |
| December | Final mow of the year |
Reading the Seattle Tacoma International Airport lawn year
Seattle Tacoma International 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 Sep 24 – Oct 9, and the year's main feeding all land before the Nov 23 frost closes the year.
Grasses that fit Seattle Tacoma International Airport
Frequently asked questions
When should I overseed my lawn in Seattle Tacoma International Airport?
For cool-season grass (bluegrass, fescue, ryegrass), overseed in early fall — in Seattle Tacoma International Airport that means roughly Sep 24 – Oct 9, timed 45–60 days before the average first fall frost (Nov 23) so seedlings establish before cold. Spring works as a backup but collides with crabgrass season.
When do I put down crabgrass preventer in Seattle Tacoma International Airport?
Aim for Feb 9 – Mar 2 — the estimated stretch when Seattle Tacoma International Airport soil approaches the ~55°F germination threshold, anchored to the average last frost (Mar 2). 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 Seattle Tacoma International Airport?
Keep mowing as long as the grass grows — in Seattle Tacoma International Airport that's typically until Nov 16 – Dec 7, around the average first fall frost (Nov 23). Take the final cut slightly shorter to discourage snow mold.
What grass grows best in Seattle Tacoma International Airport?
Washington is cool-season country: Kentucky bluegrass, tall fescue, perennial ryegrass, fine fescue. See the grass guides linked below for identification and care.