When to Plant Columbine in Unknown

Growing Columbine in Unknown: Complete Guide

Columbine (Aquilegia vulgaris) is a warm-season crop that needs a head start indoors before Unknown's last frost. Most Unknown gardeners begin seeds indoors around Wednesday, December 16, 2026 and move transplants outside around Wednesday, February 24, 2027, after the risk of frost has passed.

Because Unknown stretches across 6 USDA hardiness zones (5a, 7a, 7b, 8b, 9a, 9b), 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 365 days to maturity, Columbine needs the indoor head start that Unknown's growing season requires. Starting indoors ensures you have strong transplants ready the moment outdoor conditions are right.

Columbine requires partial shade to full sun and moderate (1 inch/week) moisture. Check your local forecast for humidity and heat advisories that may affect timing and pest pressure.

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 Unknown.