Mauna Loa 5 NNE lawn care, month by month
| Month | Tasks |
|---|---|
| January | Dormant (brown is normal) — no nitrogen, light cleanup only |
| February | Dormant (brown is normal) — no nitrogen, light cleanup only |
| March | Apply crabgrass pre-emergent |
| April | Apply crabgrass pre-emergent · Seed, sod, or plug new grass |
| May | Seed, sod, or plug new grass · First feeding at full green-up · Aerate / dethatch |
| June | Aerate / dethatch |
| July | Peak growth — regular mowing, about 1″ of water a week |
| August | Peak growth — regular mowing, about 1″ of water a week |
| September | Peak growth — regular mowing, about 1″ of water a week |
| October | Last nitrogen of the year |
| November | Growth stops — final mow |
| December | Growth stops — final mow |
Reading the Mauna Loa 5 NNE lawn year
Mauna Loa 5 NNE's lawn year runs on warmth: the lawn wakes after the last frost around Apr 12, hits full stride in midsummer, and goes dormant with the first frost around Dec 1. The two dates to respect most are the pre-emergent deadline in late winter — southern soil warms early — and the last-nitrogen cutoff 6–8 weeks before frost, which protects the lawn from winter injury.
Grasses that fit Mauna Loa 5 NNE
Frequently asked questions
When should I plant warm-season grass in Mauna Loa 5 NNE?
Seed, sod, or plug Bermuda, Zoysia, and other warm-season grasses in late spring — around Apr 26 – May 10 in Mauna Loa 5 NNE, 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 Mauna Loa 5 NNE?
Aim for Mar 22 – Apr 12 — the estimated stretch when Mauna Loa 5 NNE soil approaches the ~55°F germination threshold, anchored to the average last frost (Apr 12). 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 Mauna Loa 5 NNE?
Keep mowing as long as the grass grows — in Mauna Loa 5 NNE that's typically until Nov 17 – Dec 8, around the average first fall frost (Dec 1). Warm-season lawns then go brown-dormant for winter, which is normal.
What grass grows best in Mauna Loa 5 NNE?
Hawaii is warm-season country: Bermuda, Zoysia, St. Augustine, centipede, bahia, buffalo. See the grass guides linked below for identification and care.