Alliums are a favorite in my garden because they have a showy 'globe' bloom, and smell like onions so deer tend to leave them alone.
Alliums aren't for eating, but their ornamental value won't disappoint. Growing on long straight stems, its blue-green leaves are topped with a ball-like purple flower that is actually clusters of small purple flowers.
Alliums can handle full to part sun (mine prefer full sun) and are hardy to zone 4. They are considered xeric.
For more details on growing, performance, and maintenance click here.