Ah, Flax. A fine choice for the garden.

All plants Card

Flax

Linum usitatissimum

Zones 2–10

Growing

Since flax is a cool season crop, you should sow the seeds directly into the garden where they will grow, as they do not typically require transplanting. To ensure a successful harvest, focus on preparing a site with well-draining soil that is not waterlogged, maintaining a pH between 5.5 and 7.0. Because the plant grows as a single upright stem, it is well-suited for container gardening if you provide regular watering.

When growing for seed, you can wait to harvest until the seed capsules have turned yellow and are just beginning to split. If you are harvesting for fiber, look for the bases of the plants to turn yellow; if the plants remain green, the seeds will not be useful and the fibers will be underdeveloped. Once the plants turn brown, the fiber quality begins to degrade.

After you harvest, keep the seeds unwashed to help maintain their quality. For long-term use, you can store your harvest in a dry, cool, dark cellar or at room temperature. If you are interested in the stalks, be aware that they are quite tough and decompose slowly, often requiring removal from the garden in the spring.

Stats
Sunfull sun
Watermedium
Grow time90–150 days
Height1–3ft
Spacing6–12in
Light
Full sun✓
Part shade✓
Shade✗
Traits
Life cycleannual
Categorygrain
Growth habitupright
Seasoncool
Frost tolerancehardy
Height1–3ft
Spacing6–12in
Days to maturity90–150
Growing
Watermedium
Drainagewell drained
Soil ph min5.5
Soil ph max7.0
Propagation
Seed✓
Cutting✗
Division✗
Graft✗
Tuber bulb crown✗
Transplant✗
Container ok✓
Pollinationself fertile
Pollinator friendly✓
Toxic parts
Leaves✗
Seeds✗
Raw✗
Post harvest
Wash before storing✗
Ripens off plant✗
Curing daysnone
Shelf lifeover 3mo
Storage methods
Room temp✓
Cool dark✓
Fridge✓
Freeze✗
Can✗
Dry✓
Ferment pickle✗
Blanch before freezing✗
Calendar, zone 7
JanFebMarAprMayJunJulAugSepOctNovDec
Sownoyesyesyesnononononononono
Harvestnononononoyesyesyesnononono