Hawaii · zones 12a–12a
When to plant snap peas in Hawaii.
Sow between Nov 10 to Dec 22 in a typical year, keyed to Hawaii's median last frost around Jan 1. A second, fall sowing fits Oct 8 to Oct 16. Dates below are state medians; your ZIP code shifts them by days to weeks.
The 2026 windows
Snap Peas dates for a typical Hawaii season.
Direct sow
Nov 10 to Dec 22
Keyed to the ~Jan 1 last frost. Sow 1" deep, 2" apart.
Fall round
Oct 8 to Oct 16
Counted back from the ~Dec 31 first frost.
Harvest
~62 days later
~0.4 lb per plant over ~3 weeks.
Hawaii spans more than one climate: Zone 12 is the most common zone, but the state runs 12a to 12a. That's why the planner works from your ZIP code's frost dates, not your zone: mountain and coastal gardens in the same state can be three weeks apart.
Hawaii growing notes
Snap peas get 31 separate sowings on this calendar, which is not what a narrow, frost-edge spring pea season on the mainland ever prepares a gardener to expect.
Forget the narrow spring window; this crop runs on repeat
Peas go into the ground here direct, seeds set close, about 2 inches apart and an inch deep. A first picking comes around 62 days later, and the return is modest, close to 0.4 pounds of pods per plant across the whole run. An early planting window and a later one both stay open for peas, and stacked together the two allow as many as 31 rounds across the year, working out to a fresh short row roughly every week and a half.
That 2-inch spacing packs a lot of vine into a narrow row, and a vining pea grown that dense benefits from a trellis or netting strung along the row rather than being left to sprawl on the ground. Support keeps developing pods off wet soil and lifts the foliage into moving air instead of a still, damp tangle at ground level, which matters more here than the trellis alone might suggest once mildew enters the picture.
Succession is the real hedge against a bad stretch of heat
Peas are a cool-season crop by reputation, and a warm lowland stretch can interfere with pod set even when the vine itself looks perfectly healthy. Rather than naming a temperature this fact pack cannot back up, the test is in the blossoms: flowers that open and then drop without swelling into a pod through the hottest run of weather, picking back up again once things ease, point to heat rather than a watering or feeding problem. Where a crop scheduled for a single planting has to gamble on picking the right window, peas do not; a sowing that stalls out in a hot patch is only 11 days or so behind the next one already in the ground; the succession schedule is the fix, not a better-guessed date.
Snap peas are picked pod and all, unlike a shelling type grown just for the seed inside, and the pod is ready while it is still plump, glossy, and snaps cleanly rather than once it has swollen tight and started to look dull. Picking every day or two once a flush starts keeps the vine setting new flowers instead of putting its energy into ripening seed within the pods already hanging, and a vine picked this way over its run tends to outproduce one checked only once a week.
One insect you can see at a glance, one disease that needs the trellis to matter
Pea aphid is bigger and paler than the aphids that hide under a leaf on most other crops here, a pale green, almost see-through insect that lines up openly along new stem growth and the outside of forming pods rather than tucking out of sight. That makes it one of the easier pests on this whole calendar to catch early, since a walk down the row with an actual look at the newest growth, rather than a glance from standing height, finds it before numbers build. A firm spray from the hose or simply pinching an aphid-heavy shoot tip handles a light infestation at this scale.
Powdery mildew is the only disease that matters here, and it is the reason a trellis earns its keep. The white, dusty coating shows first on the older leaves low in the canopy, in the still, shaded air a sprawling, unsupported row traps against the ground. A trellised row that keeps air moving through the foliage slows it noticeably; an unsupported row does not. Because a new sowing goes in every week and a half or so, a heavily mildewed planting left standing too long after its flush tapers can hand the disease straight to the seedlings coming up nearby, so pulling a spent row promptly once picking slows is worth doing for the next sowing's sake, not just this one's.
In Hawaii: watch for
The pests that find snap peas here.
With about 364 frost-free days, snap pea spends longer in the ground here than in most of the country, which widens the window in which pea aphid can find it. Scout weekly from midseason and act on the first signs.
Clusters on the tender growing tips where new tendrils form.
Organic fix: Knock colonies loose with a firm blast from the hose before they build.
White powder on leaves after warm dry days and cool, dewy nights.
Organic fix: Grow resistant varieties and trellis so vines are not lying on each other.
Root rot
Seedlings stall and yellow from the bottom up, and a lifted plant shows soft brown roots instead of firm white ones.
Organic fix: Sow into a raised or well-drained bed, work compost into heavy ground, ease off the water, and move peas to fresh ground next year.
Your season math: Hawaii gives snap peas about 364 frost-free days, and it needs roughly 62 days to a first harvest. That fits about 31 re-sown rounds across the season, so you can keep it coming instead of picking once.
Planting snap peas in Hawaii: questions
When should I plant snap peas in Hawaii?+
In a typical Hawaii year, sow snap peas between Nov 10 to Dec 22, keyed to the state's median last frost around Jan 1. There's also a fall window: Oct 8 to Oct 16. Your exact dates shift with your ZIP code and microclimate.
What USDA zone is Hawaii?+
Hawaii spans zones 12a–12a, mostly zone 12. But frost dates, not zones, set planting time. The free planner uses your ZIP code's actual frost dates.
How many snap peas plants do I need?+
Depends who you're feeding. The crop page has exact counts per household size, or the free planner does the math for your family in about 60 seconds.