In the garden now (2 November 2026)
Sow or plant outside
TomatoesPeppersEggplantCucumbersZucchiniPumpkinsWatermelonsSweet cornGreen beansKaleCabbageBroccoliCarrotsBeetsOnionsPotatoesSwiss chardBasilParsley
Ready to pick
TomatoesPeppersEggplantCucumbersZucchiniPumpkinsWatermelonsSweet cornGreen beansKaleCarrotsBeetsOnionsSwiss chardBasilParsley
Coming up in the next 4 weeks
No new outdoor sowings start in the next four weeks.
Honolulu planting calendar
Bars show when each crop can go in and when a planting from that window is ready. Hover or tap a crop for details.
Sow indoorsSow or plant outdoorsHarvestToday
Swipe sideways to see the whole year →
Dates by crop
| Crop | Sow indoors | Sow / plant outdoors | Harvest |
|---|---|---|---|
| Tomato | Nov 6 – Dec 11 | Jan 1 – Dec 31 plant out | Jan 1 – Dec 31 |
| Pepper | Oct 23 – Nov 27 | Jan 1 – Dec 31 plant out | Jan 1 – Dec 31 |
| Eggplant (aubergine) | Oct 23 – Nov 27 | Jan 1 – Dec 31 plant out | Jan 1 – Dec 31 |
| Cucumber | – | Jan 1 – Dec 31 sow | Jan 1 – Dec 31 |
| Zucchini (courgette) | – | Jan 1 – Dec 31 sow | Jan 1 – Dec 31 |
| Pumpkin and winter squash | – | Jan 1 – Dec 31 sow | Jan 1 – Dec 31 |
| Watermelon | – | Jan 1 – Dec 31 sow | Jan 1 – Dec 31 |
| Sweet corn | – | Jan 1 – Dec 31 sow | Jan 1 – Dec 31 |
| Green beans | – | Jan 1 – Dec 31 sow | Jan 1 – Dec 31 |
| Peas | Too hot year-round: it bolts or fails to set before it matures. Try heat-tolerant varieties in the coolest months. | ||
| Lettuce | Too hot year-round: it bolts or fails to set before it matures. Try heat-tolerant varieties in the coolest months. | ||
| Spinach | Too hot year-round: it bolts or fails to set before it matures. Try heat-tolerant varieties in the coolest months. | ||
| Kale | Jul 14 – Aug 18 | Aug 25 – Jun 23 sow | Jan 1 – Dec 31 |
| Cabbage | Aug 13 – Sep 17 | Oct 1 – Mar 13 plant out | Nov 25 – Jun 3 |
| Broccoli | Aug 19 – Sep 23 | Oct 7 – Mar 19 plant out | Nov 24 – Jun 2 |
| Carrots | – | Jan 1 – Dec 31 sow | Jan 1 – Dec 31 |
| Beets (beetroot) | – | Jan 1 – Dec 31 sow | Jan 1 – Dec 31 |
| Radishes | Too hot year-round: it bolts or fails to set before it matures. Try heat-tolerant varieties in the coolest months. | ||
| Onions | Oct 23 – Nov 27 | Jan 1 – Dec 31 plant out | Jan 1 – Dec 31 |
| Garlic | Garlic needs about six weeks below 10 °C to form bulbs; winters here are too mild for most varieties. | ||
| Potatoes | – | Oct 28 – May 30 sow | Jan 6 – Sep 18 |
| Swiss chard | – | Jan 1 – Dec 31 sow | Jan 1 – Dec 31 |
| Basil | Nov 20 – Dec 18 | Jan 1 – Dec 31 plant out | Jan 1 – Dec 31 |
| Cilantro (coriander) | Too hot year-round: it bolts or fails to set before it matures. Try heat-tolerant varieties in the coolest months. | ||
| Parsley | – | Jan 1 – Dec 31 sow | Jan 1 – Dec 31 |
Dates are for a typical year and the middle of the window is the safest. Sow a little at a time across a window rather than all at once. Cold snaps, heat waves, frost pockets and city warmth all shift the real dates; watch the forecast.
Frost dates in Honolulu
Frost is rare in Honolulu: fewer than half of winters have one. Heat and the dry or wet season matter more here than frost; the calendar works around them.
Source: NOAA 1991–2020 normals, Honolulu Intl Ap (9 km from the city centre).
Climate at a glance
- Hardiness zone
- 12b from station records
- Average coldest winter night
- 15°C59°F
- Warmest month
- August, highs 31°C88°F
- Coldest month
- February, lows 18°C65°F
- Crops with an outdoor window
- 19 of 25
The zone follows the USDA scheme: bands of the average lowest temperature of the year, 10 °F wide, split into a and b halves. Worked out from the coldest night of each year 1991–2020 at the NOAA station. It tells you which perennials survive winter, not when to sow.
Temperature and rain by month
Average highAverage lowRainFreezing point
| Month | High | Low | Mean | Rain |
|---|---|---|---|---|
| January | 27°C81°F | 18°C65°F | 23°C73°F | 93 mm3.7 in |
| February | 27°C81°F | 18°C65°F | 23°C73°F | 52 mm2.0 in |
| March | 28°C82°F | 19°C67°F | 23°C74°F | 120 mm4.7 in |
| April | 28°C83°F | 20°C68°F | 24°C76°F | 86 mm3.4 in |
| May | 30°C85°F | 21°C70°F | 25°C78°F | 129 mm5.1 in |
| June | 30°C87°F | 22°C72°F | 26°C79°F | 69 mm2.7 in |
| July | 31°C87°F | 23°C73°F | 27°C80°F | 101 mm4.0 in |
| August | 31°C88°F | 23°C73°F | 27°C81°F | 137 mm5.4 in |
| September | 31°C88°F | 23°C73°F | 27°C81°F | 84 mm3.3 in |
| October | 30°C87°F | 22°C72°F | 26°C79°F | 108 mm4.2 in |
| November | 29°C84°F | 21°C70°F | 25°C77°F | 98 mm3.8 in |
| December | 28°C82°F | 20°C68°F | 24°C75°F | 80 mm3.1 in |
Monthly averages 1991–2020 from TerraClimate (about 4 km grid).