Camassia
Late spring to summer flowering bulbs grown for their upright, star shaped flowers, borne on tall stems. The flowers start to open at the bottom and gradually come up the stem. Unlike some other bulbs, you get leaves and flowers at the same time. Ideal for borders or woodland type plantings. Fully hardy to frost hardy.
How to plant camassia bulbs:
Plant bulbs 10cm (4") deep in moist but well drained soil, any time between September and November. Camassias will thrive in any soil which does not dry out, so are particularly useful for slightly damper parts of the garden - although they won't survive a winter in a completely water-logged site. Will take sun or part shade. In particularly cold areas a winter mulch would not go amiss.
Most camassias will naturalise quite happily, so leave the foliage to die-back to help the baby bulblets develop, and ensure good flowering in the following season. Split congested clumps after 5 years or so.