Boulder 14 W 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 · Final mow of the year |
| 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 Boulder 14 W lawn year
Boulder 14 W 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 4 – Jul 19, and the year's main feeding all land before the Sep 2 frost closes the year. With only ~73 frost-free days, the fall window is tight — miss it and the next real chance is spring.
Grasses that fit Boulder 14 W
Frequently asked questions
When should I overseed my lawn in Boulder 14 W?
For cool-season grass (bluegrass, fescue, ryegrass), overseed in early fall — in Boulder 14 W that means roughly Jul 4 – Jul 19, timed 45–60 days before the average first fall frost (Sep 2) so seedlings establish before cold. Spring works as a backup but collides with crabgrass season.
When do I put down crabgrass preventer in Boulder 14 W?
Aim for May 31 – Jun 21 — the estimated stretch when Boulder 14 W soil approaches the ~55°F germination threshold, anchored to the average last frost (Jun 21). 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 Boulder 14 W?
Keep mowing as long as the grass grows — in Boulder 14 W that's typically until Aug 26 – Sep 16, around the average first fall frost (Sep 2). Take the final cut slightly shorter to discourage snow mold.
What grass grows best in Boulder 14 W?
Colorado is cool-season country: Kentucky bluegrass, tall fescue, perennial ryegrass, fine fescue. See the grass guides linked below for identification and care.