When to Plant Peas in Hawaii
Published: April 24, 2026
Hawaii gardeners in Zone 12a have essentially year-round growing for pea. Cool-season crops like pea are best planted in the cooler winter months (October through February) — summer heat prevents these plants from heading or forming a harvestable crop. This guide gives exact dates for Hawaii based on your local frost calendar.
Pea Planting Dates for Hawaii
| Last frost (average) | Frost-free |
| Transplant outdoors | Year-round (October–March is primary window) |
| Direct sow outdoors | Year-round (October–March is primary window) |
| Expect first harvest | 45–120 days after planting |
| Fall crop start | October |
| Fall harvest | January–March |
| First fall frost (average) | Frost-free |
⚠ Plant peas 4–6 weeks before last frost — one of the first vegetables of spring. Tolerate light frost. Also plant in late summer for a fall harvest.
Growing Peas in Hawaii's Climate
Hawaii's tropical climate gives pea year-round potential, but not all months are equal. Wet season (May through October in most of Hawaii) brings disease pressure that can destroy a pea crop within days if fungal conditions align. Dry season (November through April) is the primary productive window.
Soil drainage matters more in tropical climates than almost anywhere else. Raised beds or heavily amended beds with 50% compost content drain rainfall quickly and keep pea roots oxygenated during heavy storms. Flat beds in native clay soil often fail the first wet season.
Common pea pests to watch for in Hawaii include Pea Aphid and Powdery Mildew. The first line of defense is companion planting: Carrot and Radish planted nearby discourage several of these pests by confusing host-plant identification or repelling adults before they can lay eggs. Weekly garden walks in the early morning catch problems when they're still manageable.
Pea Garden Calendar for Hawaii
| Month | Task | Notes |
|---|---|---|
| January | First harvests | Early transplants reach harvest size |
| February | Main harvest month | Peak production month in tropical climate |
| March | Continue harvests | Last window for new plantings before wet season |
| April | Finish harvests | Wet season approaching — harvest ripe crops |
| May ← | Clear beds | Disease pressure rises with wet season; warm-season ornamentals now |
| June | — | |
| July | — | |
| August | — | |
| September | — | |
| October | Prime planting window opens | Direct sow or transplant pea; dry season begins |
| November | Main planting month | Peak planting window for best harvests |
| December | Continue successions | Plant every 2–3 weeks for staggered harvest |
Pea Growing Tips for Hawaii Gardeners
- •Soak pea seeds overnight before planting to speed germination in cool soil.
- •Install a 4–6 foot trellis at planting time — peas climb from day one and produce more per square foot when supported.
- •Hawaii's tropical climate favors planting pea in dry season (October through April). Wet season plantings are destroyed by fungal disease within weeks.
- •Sow every 2 weeks through early spring for a continuous 6-week harvest window.
Companion Planting for Peas in Hawaii
In Hawaii's tropical climate, planting pea with Carrot and Radish helps deter pests and improve soil. Avoid planting near Onion and Garlic, which inhibit pea growth through root chemistry or shared pest pressure. See the full pea companion planting guide for the complete list.
Peas Planting Dates by City in Hawaii
Top cities in Hawaii — select for city-level frost dates and planting calendars.
Frequently Asked Questions
When should I plant pea in Hawaii?
In Hawaii (Zone 12a), direct sow pea around Year-round (October–March is primary window) — 5 weeks before the state's average last frost of Frost-free.
What is the last frost date in Hawaii?
Hawaii's average last frost date is Frost-free in the state's most common Zone 12a. Frost dates vary by city — higher elevations and northern counties run 1 to 3 weeks later than the state average. See the city list below for city-level frost dates.
Can I grow pea year-round in Hawaii?
Yes, Hawaii's frost-free climate supports year-round pea growing. October through March is the primary productive window; summer heat and wet-season fungal pressure limit what you can grow June through September.
What pea varieties grow best in Hawaii?
For Hawaii's Zone 12a, consult a local nursery or extension office for peas variety recommendations.
When do I start pea seeds indoors in Hawaii?
Pea does not need indoor starting in Hawaii — direct sow around Year-round (October–March is primary window) once soil reaches 40°F. Indoor starting is not recommended for this crop because pea transplants poorly.