Flax Seeds - Blue Perennial Flax


Linum perenne

Pale blue flowers atop reedy stems are often grown commercially for fiber or seed. Best seeded in early spring. Prefers cool moist growing conditions followed by a dry late summer. Easy-to-grow in full sun. Hardy to zone 4. Self-seeding perennial.

These seeds benefit from cold-moist stratification.

How to Grow
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Average Seed / ozSeed / 100' RowAverage Yield / 100' RowDays to Harvest
Planting SeasonIdeal Soil TempSunFrost Tolerance
After Last Frost65-80°FFull SunFrost Sensitive
Sowing MethodSeed DepthDirect Seed SpacingSeeds Per Packet
Direct Seed1/8"4-8"80
Mature SpacingDays to SproutProduction CycleSeed Viability
4-6"20-25Annual2 years


Site Selection


Flax is a frost-sensitive annual that prefers full sun and fertile, well-drained soil. Flax thrives in cool, moist growing conditions.




Flax can be direct seeded outdoors in spring as soon as the soil can be worked. Optimal soil temperatures for germination are 65-80°F. Sow seeds 1/8" deep. Seeds will germinate in 20-25 days. Thin seedlings so mature plants are 4-6" apart. Flax readily self-seeds year after year.




If growing for fiber, harvest flax stems before seeds fully mature (120-140 days). Allow some plants to set seed to ensure flax plants the following year.