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Leek seeds, Giant Musselburg

Leek - Giant Musselburg

Allium porrum

HEIRLOOM -Only the toughest leeks could come from Scotland, and this one rises to the occasion! Exceptional variety, very cold hardy with large stalks that grow to be 9-15" long and 2-3" in diameter. Mild and tender stalks with blue-green leaves. A tasty allium with a long history of cultivation. The Roman emperor Nero listed leeks among his favorite foods and believed that they gave him a good singing voice. More recently, the leek has become a national symbol of Wales, with the Welsh enthusiastically integrating it into many of their dishes. A little less robust than an onion in flavor, leeks are used in stocks, soups, braised dishes, or caramelized for a gourmet addition to pizza and quiche. Nutrients: vitamins A, K, C, B6, and iron. 

Regular price $2.50 $2.50 Sale

Average Seed / oz Seed / 100' Row Average Yield / 100' Row Days to Harvest
10000 4 gr 150 stalks 80-150
Planting Season Ideal Soil Temp Sun Frost Tolerance
All 60-80°F Full Sun Very Tolerant
Sowing Method Seed Depth Direct Seed Spacing Seeds Per Packet
Transplant or Direct Seed 1/4" 1" 340
Mature Spacing Days to Sprout Production Cycle Seed Viability
4-6" 6-16 Biennial 2-4 years

Bed Preparation

Leeks are cold hardy biennials that prefer rich, well-drained soil. Amend with compost prior to planting. Plant leeks in full sun.


Leeks can be grown from starts (young plants) or seed. Plant leek starts outdoors as soon as the soil can be worked in late winter-early spring. Space starts 4-6" apart in rows 12" apart. Blanching (preventing a portion of the plant from getting sunlight) is done to create the white, tender portion we most often eat. One planting method involves digging a 6" deep v-shaped trench and filling it with soil as the plants grow taller. The other less labor intensive technique is to poke 6" deep holes and insert leek starts. Soil can then be mounded around the base of plants as they grow. You can also place a portion of cardboard paper towel center around the lower part of the stem for blanching. Keep plants moist until well established and mulch to conserve moisture and minimize weeds.

Plant leek seeds indoors 6-8 weeks before the last frost date or in late summer for overwintering and early spring harvest. Sow seeds 1/4" deep and 1" apart. Seeds germinate best when soil temperatures are between 60-80°F. Seeds will sprout in 6-16 days. Thin seedlings so that mature plants are 4-6" apart. Hardened off seedlings can be transplanted outdoors as soon as the soil can be worked.


Leeks can be harvested on average in 95 days after planting or when plants are large enough to eat.

Seed Saving

Leeks are biennial, meaning they flower, set seed and die during their second year of growth. Harvest seed when flowers begin to turn brown. Remove flower head and finish drying indoors. Store seeds in a cool, dry place. Seeds remain viable for 2-4 years.