When to Plant Broccoli in Hawaii

Growing Broccoli in Hawaii: Complete Guide

Broccoli (Brassica oleracea var. italica) is a warm-season crop that needs a head start indoors before Hawaii's last frost. Most Hawaii gardeners begin seeds indoors around Thursday, November 20, 2025 and move transplants outside around Thursday, January 1, 2026, after the risk of frost has passed.

Because Hawaii stretches across 6 USDA hardiness zones (10b, 11a, 11b, 12a, 12b, 13a), planting windows can shift by as much as six to eight weeks from one end of the state to the other. Gardeners in the warmer southern zones can start earlier, while those in cooler northern zones should wait until the zone table above shows their last frost has passed.

With 60 days to maturity, Broccoli needs the indoor head start that Hawaii's growing season requires. Starting indoors ensures you have strong transplants ready the moment outdoor conditions are right.

Broccoli requires full sun (6 hours) and regular (1-1.5 inches/week) moisture. Hawaii's year-round warmth allows continuous planting, though elevation and trade wind exposure create distinct growing pockets.

For the most precise planting dates tailored to your exact location, enter your ZIP code on our planting calendar or use the zone table above to find the schedule for your area of Hawaii.