Riley 10 WSW lawn care, month by month
| Month | Tasks |
|---|---|
| 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 Riley 10 WSW lawn year
Riley 10 WSW 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 ~92 frost-free days, the fall window is tight — miss it and the next real chance is spring.
Grasses that fit Riley 10 WSW
Frequently asked questions
When should I overseed my lawn in Riley 10 WSW?
For cool-season grass (bluegrass, fescue, ryegrass), overseed in early fall — in Riley 10 WSW 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 Riley 10 WSW?
Aim for May 21 – Jun 11 — the estimated stretch when Riley 10 WSW soil approaches the ~55°F germination threshold, anchored to the average last frost (Jun 11). 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 Riley 10 WSW?
Keep mowing as long as the grass grows — in Riley 10 WSW 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 Riley 10 WSW?
Oregon is cool-season country: Kentucky bluegrass, tall fescue, perennial ryegrass, fine fescue. See the grass guides linked below for identification and care.