Strikingly beautiful in bloom, Linum perenne (Perennial Flax) is a semi-evergreen perennial forming tufts of narrow blue-green leaves and profuse sky blue saucer-shaped flowers, 1 in. across (2.5 cm), over a long season. Blooming in late spring to midsummer, the blossoms usually keep blooming for up to 8 weeks, up to 12 weeks when planted in partial shade. The flowers open in the morning and last for only one day, but the plant flowers profusely, making up for the short bloom time. They are borne atop wiry stems along with great quantities of nodding flower buds. As the blooms fade, their seedpods add interest to the plant in late summer. While the stems look delicate, they are difficult to break and were once used to make linen and rope. Heat, humidity and drought tolerant, Perennial Flax provides a lovely display when massed.