Zone 4-11
Height:  60-90cm [24-36"]
Spread:  45-60cm [18-24:"]
Bloom:  Early summer spikes with lovely blue flowers
Foliage:  Lily-like narrow strap leaves form a basal clump
Light:  Sun to part shade
Water:  Plenty in spring; little to none in later summer when plant goes completely dormant 
Soil:  Loose, not too rich, well-drained
Garden location:  Mid-border