Flax (Linum usitatissimum L.) was grown under conventional and organic management systems in a long-term Canadian field trial (The Glenlea long-term crop rotation study (http://www.umanitoba.ca/afs/plant_science/glenlea/glenlea.html). The study includes two crop rotations: A grain only rotation (wheat-pulse crop-oat-flax) and a grain-forage rotation (wheat-alfalfa-alfalfa-flax). Measurements include flax yield, micronutrient concentration, and various soil and pest parameters. Significant rotation by system interactions (P<0.05) were observed in 2 of the 4 years where comparisons between organic and conventional flax yields were possible. In the grain only crop rotation, organic flax yielded 50% less under organic than conventional management; in the alfalfa-containing rotation, organic flax yielded only 12% less under organic management compared with conventional management. Micronutrient concentration was measured in flaxseed from the 1995 and 1999 test years. Results indicated some increase in copper and zinc concentration in flaxseed under organic compared with conventional management. Micronutrient concentration was never lower in organic than in conventionally-grown flax. Results of this study show that organic flax production is possible, however robust crop rotations such as those with perennial forages are needed. Future work will include oil content and oil quality determination on samples from the 14 year study.