Linum usitatissimum, or Flax, is a flowering plant with blue flowers and slender stems. It is cultivated for its seeds, which are used to produce flaxseed oil and linseed, and its fibers, which are used to make linen. Inputs Hardiness zone 41 Hardiness zone 51 Hardiness zone 61 Hardiness zone 71 Hardiness zone 81 Outputs Flaxseed Type Annual Functions Potassium accumulator2 Manganese accumulator2 Iron accumulator2 Footnotes Linum usitatissimum | Plants for a Future ↩ ↩2 ↩3 ↩4 ↩5 Gaia’s Garden - A Guide to Home-Scale Permaculture, 2nd Edition Table 6-2 ↩ ↩2 ↩3