Arco 17 SW 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 · Light feeding after green-up |
| June | Light feeding after green-up |
| 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 Arco 17 SW lawn year
Arco 17 SW 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 2 – Aug 17, and the year's main feeding all land before the Oct 1 frost closes the year. With only ~130 frost-free days, the fall window is tight — miss it and the next real chance is spring.
Grasses that fit Arco 17 SW
Frequently asked questions
When should I overseed my lawn in Arco 17 SW?
For cool-season grass (bluegrass, fescue, ryegrass), overseed in early fall — in Arco 17 SW that means roughly Aug 2 – Aug 17, timed 45–60 days before the average first fall frost (Oct 1) so seedlings establish before cold. Spring works as a backup but collides with crabgrass season.
When do I put down crabgrass preventer in Arco 17 SW?
Aim for May 3 – May 24 — the estimated stretch when Arco 17 SW soil approaches the ~55°F germination threshold, anchored to the average last frost (May 24). 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 Arco 17 SW?
Keep mowing as long as the grass grows — in Arco 17 SW that's typically until Sep 24 – Oct 15, around the average first fall frost (Oct 1). Take the final cut slightly shorter to discourage snow mold.
What grass grows best in Arco 17 SW?
Idaho is cool-season country: Kentucky bluegrass, tall fescue, perennial ryegrass, fine fescue. See the grass guides linked below for identification and care.