Carentan

Family: Amaryllidaceae Vegetable

Sweet, mellow Carentan leeks unfurl with a tender, buttery bite and a clean, grassy-sweet aroma that feels instantly refined.

At maturity, the long, cylindrical stalks form a tightly layered, deep-green outer jacket over a pale, creamy-to-warm ivory center, with a crisp yet yielding texture that holds its character beautifully. Grow Carentan for comforting soups and braises, as well as elegant fresh slices and savory gratins—ideal when you want flavor that’s gentle, not sharp.

Light: Full SunMaturity: 120 DaysHabit: Upright

Planting schedules and alerts are optimized for Columbus (Zone 6b).

Crop Dates

Milestone	Date
Start Indoors	Feb 28th
Last Frost	Apr 25th
Transplant / Sow Outdoors	Apr 18th
Harvest Begins	Aug 16th
Harvest Ends	Oct 16th

Crop Details

Trait	Value
Days to Maturity	120
Sun Requirements	Full Sun
Growth Habit	Upright
Support Needed	None
Planting Depth	Normal
Germination Temp (°F)	70
Min Soil Temp (°F)	45
Min Night Temp (°F)	35
Harden Off (days)	6

Culinary Notes

Chef's Note

Carentan leeks bring a cultivated sweetness and a tender, layered bite that doesn’t turn mushy—perfect for soups and gratins where you want each strand to read as leek, not puree. The clean, grassy aroma makes them feel refined even in comfort-food form, especially when finished with butter and a bright squeeze of lemon.

Best Uses

slow-simmered leek soups that turn silky without getting stringy
braises where the layers soften and sweeten into a spoonable side
thin fresh slices dressed in lemony vinaigrette (for snap-to-tender balance)
gratin duty—layered with cream so the leek stays fragrant and structured

Flavor Profile

sweet, mellow allium bite buttery-tender texture with a clean grassy-sweet aroma silky interior that stays cohesive when cooked gentle savoriness—no harsh edge

Kitchen Pairings

butter heavy cream lemon thyme gruyère chicken stock

Frequently Asked Questions

What pest or disease commonly affects leeks (Allium porrum), and how do I manage it?

Leeks are commonly hit by leek rust (Puccinia porri) and sometimes leek moth/caterpillars. For rust, remove infected leaves and improve airflow by spacing plants; avoid overhead watering and use a copper-based fungicide if disease is spreading early. For leek moth, inspect leaves for tunnels and frass and apply a row cover immediately after planting to prevent egg-laying, then remove damaged tissue.

How often should I water leeks during the main growing phase (around weeks 6–16)?

Keep the soil consistently moist but not waterlogged—aim for even moisture during the rapid leaf and thickening growth. Water when the top 1 inch of soil begins to dry, typically about 1–2 times per week depending on heat and mulch, and ensure water reaches down around the base for good white-stem development.

How can I tell when my leeks (Allium porrum) are ready to harvest?

Harvest at about 120 days when the plants have a firm, thick white-to-light-green stem and the leaves are still relatively upright rather than collapsing. Use a gentle twist-and-lift to test firmness; if the lower stalk feels crisp and substantial, it’s ready. For the best flavor, harvest before severe frost when possible, but you can leave them in the ground for a period with protection in colder weather.