Request a FREE 2018 Seed Catalog and Planting Guide

Herb seed - Flax, Fiber : Cool season, early maturing plant.

Herb - Flax, Fiber

Linum usitatissimum

The outer fibers of the flax plant are used to make linen. When being grown for fiber the seeds should be planted close together in an open site with wind and sun exposure. Flax is a cool season, early maturing plant. When the plant starts to bloom, hot and dry weather is needed for the threshing and drying of the fibers. (1 Gram Packet)

Regular price $2.95 $1.48 Sale

Average Seed / oz Seed / 100' Row Average Yield / 100' Row Days to Harvest
4500 n/a n/a 90-100
Planting Season Ideal Soil Temp Sun Frost Tolerance
After Last Frost 65-80°F Full Sun Frost Sensitive
Sowing Method Seed Depth Direct Seed Spacing Seeds Per Packet
Direct Seed 1/8" 1-2" 160
Mature Spacing Days to Sprout Production Cycle Seed Viability
4-6" 20-25 Annual 2 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.