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Giant Musselburgh

Leek
Zone 3a Save Garden

Planting Schedule

Add Giant Musselburgh to your garden to build a schedule and get reminders.
Botanical illustration of Giant Musselburgh
120d to harvest

Sweet, mild, and richly aromatic—Giant Musselburgh leeks unfurl into long, tender stalks with a creamy, pale core that feels silky between the fingers. Expect a substantial, upright growth habit and a satisfying bite that turns beautifully mellow when roasted or simmered, making them a standout for hearty dishes and elegant sauces. A classic market-class choice for gardeners who love dependable performance and impressive size at 120 days.

Crop Dates

Growing note: Zone 3a has only 109 frost-free days — shorter than this crop's 120-day maturity. Outdoor planting is not viable; use protected cultivation.
MilestoneDate
Last FrostMay 15th
Growing ApproachProtected Environment Only

Crop Details

TraitValue
Days to Maturity120
Sun RequirementsFull SunFull sun
Growth HabitUpright
Support NeededNone
Planting DepthNormal
Germination Temp (°F)70
Min Soil Temp (°F)45
Min Night Temp (°F)35
Harden Off (days)7

Today's Conditions

Outdoor planting for Giant Musselburgh in Zone 3a typically begins around Indoor Lights Only. Wait until soil reaches at least 45°F before transplanting Giant Musselburgh.

Garden Alerts

Zone 3a has only 109 frost-free days — shorter than this crop's 120-day maturity. Outdoor planting is not viable; use protected cultivation.

Recommended Companions

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Frequently Asked Questions

What pest or disease is most common on Allium porrum (giant leek) and how do I control it?
Leek moth (Crocidomorphus/Plutella-related pests) is a common problem: larvae bore through the stalks and leave frass trails. Start with tight weed-free beds and use fine insect netting as soon as plants are established; remove and destroy heavily damaged leaves. If you see ongoing damage, apply an approved Bt (Bacillus thuringiensis) product labeled for lepidopteran caterpillars and re-apply according to label intervals.
How often should I water Allium porrum during the main growing phase?
During the 60–110 day growing window (after seedlings establish), keep the soil consistently evenly moist but never waterlogged—aim for about 1 inch (2.5 cm) of water per week split into 1–2 deep sessions. Water more frequently during hot spells so the inner leaf bases don’t dry out; leeks are sensitive to irregular moisture that can lead to thin, woody stems. Check by feel: the top few inches should be moist and crumbly, not dry or soggy.
Botanical illustration of Giant Musselburgh

Sweet, mild, and richly aromatic—Giant Musselburgh leeks unfurl into long, tender stalks with a creamy, pale core that feels silky between the fingers. Expect a substantial, upright growth habit and a satisfying bite that turns beautifully mellow when roasted or simmered, making them a standout for hearty dishes and elegant sauces. A classic market-class choice for gardeners who love dependable performance and impressive size at 120 days.

Today's Conditions

Outdoor planting for Giant Musselburgh in Zone 3a typically begins around Indoor Lights Only. Wait until soil reaches at least 45°F before transplanting Giant Musselburgh.

Garden Alerts

Zone 3a has only 109 frost-free days — shorter than this crop's 120-day maturity. Outdoor planting is not viable; use protected cultivation.

Sowing Tips

Soil Temperature

Direct sow or transplant when soil at planting depth holds 45°F for reliable germination and early growth.

Expert Note

For Giant Musselburgh, transplant when seedlings are pencil-thick and keep the base repeatedly earthed up to build long white shanks.