When to Plant Leek in Alaska

Growing Leek in Alaska: Complete Guide

Leek (Allium ampeloprasum) is a warm-season crop that needs a head start indoors before Alaska's last frost. Most Alaska gardeners begin seeds indoors around Sunday, March 1, 2026 and move transplants outside around Sunday, May 24, 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 120 days to maturity, Leek 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.

Leek requires full sun and regular moisture. Most of Alaska receives adequate sunlight during the growing season, though gardeners in humid eastern regions should watch for fungal issues and ensure good air circulation.

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.