How to grow perennial flax

When to plant perennial flax

Propagate perennial flax with seed or with stem cuttings taken in summer; division is not advised because the root system is sparse (NC State). Grow in full sun or partial shade in well-drained soil, which is essential.

Perennial Flax is timed by season rather than your frost dates, so the planting calendar does not generate ZIP-specific dates for it. Check the cited sources below to fine-tune for your area.