When to Plant Radicchio in Alaska

Growing Radicchio in Alaska: Complete Guide

Radicchio (Cichorium intybus) is a warm-season crop that needs a head start indoors before Alaska's last frost. Most Alaska gardeners begin seeds indoors around Sunday, April 12, 2026 and move transplants outside around Sunday, April 26, 2026, after the risk of frost has passed.

Because Alaska stretches across 16 USDA hardiness zones (1a, 1b, 2a, 2b, 3a, 3b, 4a, 4b, 5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b), 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 80 days to maturity, Radicchio needs the indoor head start that Alaska's growing season requires. Starting indoors ensures you have strong transplants ready the moment outdoor conditions are right.

Radicchio requires full sun to partial shade and regular (keep moist) moisture. Alaska's long summer days accelerate growth, but frost can arrive early in August — season extension with row covers is essential.

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 Alaska.