When to Plant Larkspur in Hawaii

Growing Larkspur in Hawaii: Complete Guide

Larkspur (Consolida ajacis) is a crop that grows best when sown directly in the garden. Depending on your zone, the right time to direct sow in Hawaii falls between December 4, 2026 (Zone 11a) and December 18, 2026 (Zone 10b), once soil temperatures are consistently warm enough for germination.

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 65 days to maturity, Larkspur fits comfortably within Hawaii's growing season in most zones. In the warmest parts of the state, a second planting later in the season may be possible.

Larkspur requires full sun to partial shade and moderate (1 inch/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.