Hilo lawn care, month by month
| Month | Tasks |
|---|---|
| January | Apply crabgrass pre-emergent |
| February | Apply crabgrass pre-emergent · Seed, sod, or plug new grass |
| March | Seed, sod, or plug new grass · First feeding at full green-up · Aerate / dethatch |
| April | Aerate / dethatch |
| May | Peak growth — regular mowing, about 1″ of water a week |
| June | Peak growth — regular mowing, about 1″ of water a week |
| 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 | Last nitrogen of the year |
| December | Growth stops — final mow |
Reading the Hilo lawn year
Hilo is effectively frost-free, so the lawn never truly goes dormant — it just slows through the mildest months. Timing here follows soil warmth and rainfall rather than frost: pre-emergent in late winter, establishment in mid-spring, feeding through the warm months with a taper in fall.
Grasses that fit Hilo
Frequently asked questions
When should I plant warm-season grass in Hilo?
Seed, sod, or plug Bermuda, Zoysia, and other warm-season grasses in late spring — around Feb 24 – Mar 10 in Hilo, 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 Hilo?
Aim for Jan 20 – Feb 10 — the estimated stretch when Hilo soil approaches the ~55°F germination threshold. 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 Hilo?
Hilo lawns grow essentially year-round — mowing never fully stops, it just slows in the cooler months. Keep cutting whenever the grass is actively growing.
What grass grows best in Hilo?
Hawaii is warm-season country: Bermuda, Zoysia, St. Augustine, centipede, bahia, buffalo. See the grass guides linked below for identification and care.