The Allium 'Cowanii, 'Allium neapolitanum', a fall planted ornamental onion bulb, produces beautiful white flowers. The Cowanii is a classic Allium variety, introduced in the 18th century. Allium neapolitanum blooms with graceful clusters of white stars. The blooms are pleasantly fragrant and this plant is an easy and prolific addition to the garden. This Allium is easy to grow and does well in average to rich, well drained soil. Plant in groups of ten or more for an eye catching focal point. Divide mature clumps in August if areas become overcrowded. Alliums prefer to be dry during their dormancy. The Allium cowanii is ideal for containers, mass plantings, borders, and cut flowers. These plants are rabbit, squirrel, and deer resistant. The Cowanii has a bloom period of about 3 weeks, and they bloom in late spring to early summer.

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