Allium rosenbachianum (Showy Persian Flowering Onion)

Allium rosenbachianum  (Showy Persian Onion)
A hard-to-find heritage species of ornamental onion found in the Himalayas of Pakistan, Afghanistan, Kyrgyzstan and Tajikistan, Showy Persian Onion blooms in late spring, about 2 weeks earlier than other large-flowered onions, atop strong 24-30” stems. The 4” diameter dark violet spheres are packed with florets that are rich in nectar and pollen, making them favorites of bees, butterflies, and other pollinators. They work well planted in a perennial bed where the perennials will grow in and cover the allium’s aging foliage. Plant 6 to 8” deep and 6” apart in groups of 3 or 5 in sunny or part-shade locations in enriched, well-drained soil. Hardy to Zone 4.