Linum (flax) is a genus of flowering plants Linaceae family which includes the common flax which is used to produce linen and linseed oil.

Linum perenne or Blue Flax as it is commonly known is a perennial flower with pretty little sky-blue flowers, measuring 15mm to 20mm across. The blooms are carried on light and graceful arching branches. Blue flax stands up well to heat, but it prefers cool coastal summers, and it will bloom longer in cool coastal climates. Blue Flax is showy, every morning it covers itself with blue flowers, hundreds per day. The leaves themselves stay at 50cm but the flowers arise above making a total arching display 90cm high. Prefers full sun, and loose, dry soil, but it is very adaptable. Blue Flax is a good wild garden flower.