Highmore 23 N 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 | Apply crabgrass pre-emergent |
| May | Apply crabgrass pre-emergent · Light feeding after green-up |
| June | Light feeding after green-up |
| July | Aerate + overseed |
| 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 Highmore 23 N lawn year
Highmore 23 N 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 31 – Aug 15, and the year's main feeding all land before the Sep 29 frost closes the year. With only ~138 frost-free days, the fall window is tight — miss it and the next real chance is spring.
Grasses that fit Highmore 23 N
Frequently asked questions
When should I overseed my lawn in Highmore 23 N?
For cool-season grass (bluegrass, fescue, ryegrass), overseed in early fall — in Highmore 23 N that means roughly Jul 31 – Aug 15, timed 45–60 days before the average first fall frost (Sep 29) so seedlings establish before cold. Spring works as a backup but collides with crabgrass season.
When do I put down crabgrass preventer in Highmore 23 N?
Aim for Apr 23 – May 14 — the estimated stretch when Highmore 23 N soil approaches the ~55°F germination threshold, anchored to the average last frost (May 14). 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 Highmore 23 N?
Keep mowing as long as the grass grows — in Highmore 23 N that's typically until Sep 22 – Oct 13, around the average first fall frost (Sep 29). Take the final cut slightly shorter to discourage snow mold.
What grass grows best in Highmore 23 N?
South Dakota is cool-season country: Kentucky bluegrass, tall fescue, perennial ryegrass, fine fescue. See the grass guides linked below for identification and care.