Flax prefers a sunny position with well-drained soil and tolerates poor, sandy conditions. Once established, it is relatively low-maintenance, needing only occasional watering during prolonged dry spells. Remove spent flowers to a longer bloom period, and cut back the stems after flowering to maintain a neat, compact shape.
This hardy perennial generally requires little feeding, though a light mulch in spring can support growth, and it is resistant to pests and diseases.