Colusa 2 SSW lawn care, month by month
California 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 | Apply crabgrass pre-emergent | Apply crabgrass pre-emergent |
| February | Apply crabgrass pre-emergent · Light feeding after green-up | Apply crabgrass pre-emergent · Seed, sod, or plug new grass |
| March | Light feeding after green-up | Seed, sod, or plug new grass · First feeding at full green-up · Aerate / dethatch |
| April | Mow high (3–3.5″); water deeply in dry spells; no feeding in heat | Aerate / dethatch |
| May | Mow high (3–3.5″); water deeply in dry spells; no feeding in heat | Peak growth — regular mowing, about 1″ of water a week |
| June | Mow high (3–3.5″); water deeply in dry spells; no feeding in heat | Peak growth — regular mowing, about 1″ of water a week |
| July | Mow high (3–3.5″); water deeply in dry spells; no feeding in heat | Peak growth — regular mowing, about 1″ of water a week |
| August | Mow high (3–3.5″); water deeply in dry spells; no feeding in heat | Peak growth — regular mowing, about 1″ of water a week |
| September | Mow high (3–3.5″); water deeply in dry spells; no feeding in heat | Peak growth — regular mowing, about 1″ of water a week |
| October | Aerate + overseed · Main fall feeding | Last nitrogen of the year |
| November | Main fall feeding · Winterizer feeding · Final mow of the year | Growth stops — final mow |
| December | Final mow of the year | Growth stops — final mow |
Reading the Colusa 2 SSW lawn year
Transition-zone timing cuts both ways in Colusa 2 SSW: cool-season lawns get their big renovation in early fall (overseed Oct 2 – Oct 17), while warm-season lawns establish in late spring (Feb 28 – Mar 14) and want their last feeding by Oct 6 – Oct 20. The one shared date is the pre-emergent window in spring — both families need crabgrass stopped before soil crosses 55°F.
Grasses that fit Colusa 2 SSW
Frequently asked questions
When should I overseed my lawn in Colusa 2 SSW?
For cool-season grass (bluegrass, fescue, ryegrass), overseed in early fall — in Colusa 2 SSW that means roughly Oct 2 – Oct 17, timed 45–60 days before the average first fall frost (Dec 1) so seedlings establish before cold. Spring works as a backup but collides with crabgrass season.
When should I plant warm-season grass in Colusa 2 SSW?
Seed, sod, or plug Bermuda, Zoysia, and other warm-season grasses in late spring — around Feb 28 – Mar 14 in Colusa 2 SSW, 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 Colusa 2 SSW?
Aim for Jan 24 – Feb 14 — the estimated stretch when Colusa 2 SSW soil approaches the ~55°F germination threshold, anchored to the average last frost (Feb 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 Colusa 2 SSW?
Keep mowing as long as the grass grows — in Colusa 2 SSW that's typically until Nov 24 – Dec 15, around the average first fall frost (Dec 1). Take the final cut slightly shorter to discourage snow mold.
What grass grows best in Colusa 2 SSW?
California 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.