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Leek Growing Guide

Growing Leeks

Leeks are hardy and easy to grow in cool climates. They can be planted according to your climate, not day length like onion plants. The best temperature for growth and production is 55°-75°F.

Caring Instructions

Remove the plants from the box immediately. Do not put in soil or water before planting. Keep cool and dry until you can plant.

Preparing the Soil and Planting

Leeks are best grown in direct sunlight in well-drained soil that is rich in nutrients.

Fertilization and Watering

Follow the same guidelines as onion plants.

Planting (A Note on Blanching)

Take the handle of a hoe and poke holes 6 to 8 inches deep where each plant will go; then place the seedlings, one to each hole, so the youngest leaf protrudes just above the soil surface. Turn on the sprinkler. This will settle the soil in the hole around the roots at the bottom and provide automatic blanching for the lower part of the stem. Plant leeks in holes 4-6 inches deep, 4-6 inches apart, in rows 6 to 12 inches apart. As your leeks grow, throw dirt up on the shaft to keep it nice and white.

Diseases, Insects, and Weeds

Follow the same guidelines as onion plants.

Harvest and Storage

Leeks can be harvested at any time, but because they are so hardy, are usually left in place until needed. Leeks need to be stored near 32°F and at “high humidity.” Cool them upon digging. Pack them in plastic bags to prevent their drying out. Leeks can keep this way for two to three months. They can be stored frozen, and for maximum flavor, cooked without thawing.

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