Reserve Rs lawn care, month by month
New Mexico sits in the turf transition zone, so the calendar depends on which grass family you have — they run on opposite schedules. Cool-season lawns (tall fescue, bluegrass) peak in spring and fall; warm-season lawns (Bermuda, Zoysia) do everything in the warm half. Not sure which you have? Start with the grass identification guides.
| Month | Cool-season lawns | Warm-season lawns |
|---|---|---|
| January | Dormant — keep leaves cleared, stay off frozen turf | Dormant (brown is normal) — no nitrogen, light cleanup only |
| February | Dormant — keep leaves cleared, stay off frozen turf | Dormant (brown is normal) — no nitrogen, light cleanup only |
| March | Dormant — keep leaves cleared, stay off frozen turf | Dormant (brown is normal) — no nitrogen, light cleanup only |
| April | Dormant — keep leaves cleared, stay off frozen turf | Dormant (brown is normal) — no nitrogen, light cleanup only |
| May | Apply crabgrass pre-emergent · Light feeding after green-up | Apply crabgrass pre-emergent |
| June | Light feeding after green-up | Seed, sod, or plug new grass · First feeding at full green-up · Aerate / dethatch |
| July | Mow high (3–3.5″); water deeply in dry spells; no feeding in heat | First feeding at full green-up · Aerate / dethatch |
| August | Aerate + overseed · Main fall feeding | Last nitrogen of the year |
| September | Main fall feeding · Winterizer feeding · Final mow of the year | Growth stops — final mow |
| October | Final mow of the year | Growth stops — final mow |
| November | Dormant — keep leaves cleared, stay off frozen turf | Dormant (brown is normal) — no nitrogen, light cleanup only |
| December | Dormant — keep leaves cleared, stay off frozen turf | Dormant (brown is normal) — no nitrogen, light cleanup only |
Reading the Reserve Rs lawn year
Transition-zone timing cuts both ways in Reserve Rs: cool-season lawns get their big renovation in early fall (overseed Aug 4 – Aug 19), while warm-season lawns establish in late spring (Jun 13 – Jun 27) and want their last feeding by Aug 8 – Aug 22. The one shared date is the pre-emergent window in spring — both families need crabgrass stopped before soil crosses 55°F.
Grasses that fit Reserve Rs
Frequently asked questions
When should I overseed my lawn in Reserve Rs?
For cool-season grass (bluegrass, fescue, ryegrass), overseed in early fall — in Reserve Rs that means roughly Aug 4 – Aug 19, timed 45–60 days before the average first fall frost (Oct 3) so seedlings establish before cold. Spring works as a backup but collides with crabgrass season.
When should I plant warm-season grass in Reserve Rs?
Seed, sod, or plug Bermuda, Zoysia, and other warm-season grasses in late spring — around Jun 13 – Jun 27 in Reserve Rs, once soil has warmed well past the last frost. That gives new grass a full growing season to mature before its first winter dormancy.
When do I put down crabgrass preventer in Reserve Rs?
Aim for May 9 – May 30 — the estimated stretch when Reserve Rs soil approaches the ~55°F germination threshold, anchored to the average last frost (May 30). 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 Reserve Rs?
Keep mowing as long as the grass grows — in Reserve Rs that's typically until Sep 26 – Oct 17, around the average first fall frost (Oct 3). Take the final cut slightly shorter to discourage snow mold.
What grass grows best in Reserve Rs?
New Mexico is in the turf transition zone, so both families are common: Tall fescue and Kentucky bluegrass alongside Bermuda and Zoysia. Tall fescue is the usual cool-season pick and Bermuda or Zoysia the warm-season ones — they run on opposite calendars, so identify what you have first. See the grass guides linked below for identification and care.