How to Grow Leek

Updated June 2026

A cool-season root for the home garden across the warmer US.

What it looks like as it grows

Leek is a rewarding cool-season crop for backyard growers.

When to plant

Leek is a cool-season crop. In the South and Southwest, plant in fall through winter when the heat eases. See your region on the leek page for exact timing.

Varieties

• American Flag, Hardy, large-stemmed heirloom (Southern Exposure Seed Exchange)
• King Richard, Fast, long white shanks (Johnny's Selected Seeds)

How to grow it

• Sun & soil: full sun, rich well-drained soil with even moisture.
• Spacing: about 6 in between plants.
• Sowing: sow about 2 in deep.
• Water: roughly 1.3 gal per plant every 2 days in hot weather.

Pests & problems

Watch for Thrips and Leek moth. In humid regions, Rust and Leaf blight can appear, so space for airflow and water at the roots in the morning.

Harvest

Leek is usually ready to harvest in about 4 months. Pick regularly to keep plants productive.

When to plant in your region

Pick your region to see exactly when to plant leek where you garden.

See also: Leek in the plant library →

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