When to Plant Larkspur in Wyoming

Growing Larkspur in Wyoming: 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 Wyoming falls between March 28, 2027 (Zone 5b) and April 17, 2027 (Zone 4a), once soil temperatures are consistently warm enough for germination.

Because Wyoming stretches across 4 USDA hardiness zones (4a, 4b, 5a, 5b), planting windows can shift by as much as two to four 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 Wyoming'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. Mountain-state gardens contend with short seasons and intense UV at elevation — cold nights can persist well into June at higher altitudes.

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 Wyoming.