Overwintering Tiny Leek Seedlings in Zone 2b: Not Worth the Risk

The Dilemma

A Manitoba market gardener has a crowded flat of small leek seedlings that missed spring planting. Zone 2b winters are brutal; she considers overwintering in a cold cellar for spring transplant.

Why It’s Not Recommended

• High mortality risk even in a cold cellar.
• Premature bolting: Leeks are biennials; after a cold period, they often flower (bolt) the next summer instead of bulking up, rendering them tough and inedible.
• Time and space cost vs. starting fresh.

Better Plan

Sow fresh leek seed indoors in late winter (February–March) for sturdy transplants by spring. Fresh seedlings establish faster, resist bolting better, and yield a reliable harvest.

If You Still Want to Try

Keep the flat just above freezing, barely moist, and in darkness. But expect low survival and high bolting rates.