Ornamental onion (Allium senescens) AL-ee-um sen-ESS-senz Genus:  Allium This plant has thin, strap-like foliage that tends to twist. It produces up to 30 long-lasting, 12- to 40-inch-tall pink or lilac flowers in mid- to late summer. Noteworthy Characteristics:  Attractive to hummingbirds. Care:  Provide full sun to part shade and most any well-drained soil. Propagation:  Sow seed in spring in containers or in situ. Divide clump-forming plants in spring. Problems:  Bulb rot in damp conditions. Onion fly and thrips.

Overview

Height 6 in. to 12 in. Spread 6 in. to 12 in. Growth Habit Clumps Light Full Sun to Part Shade Moisture Adaptable Maintenance Low Characteristics Attracts Butterflies, Fragrant Flowers Bloom Time Late Summer, Summer Flower Color Pink, Purple Uses Beds and Borders Style Rock Garden Seasonal Interest Summer Interest Type Bulbs