Blue flax is a short-lived perennial native to a huge swathe North America.
It has blue-green needlelike leaves and shimmering sky blue flowers, borne on wiry stems 60cm tall.
It has a long bloom period - from late spring to mid-summer - but the flowers only truly open on sunny days.
Very decorative rounded seed-heads form in summer.
It grows on ridges and dry slopes, from sea level in Alaska up to 3,400 m in the Sierra Nevada so it's a tough little plant adapting itself to some harsh climatic swings.
Grow in poor, well-drained soil and full sun.
Photo: Photo by and (c)2008 Derek Ramsey (Ram-Man). Chanticleer Garden, from Wikimedia Commons
Well drained, poor
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