Related to A. neapolitanum
, A. cowanii is a 1823 heirloom prized for its sprays of glistening white floral umbels. Each 2”-wide umbel is comprised of dozens of white florets adorned with ivory-green anthers and pale green eyes (ovaries). Long-lasting, it is ideal in full sun to partial shade, in densely planted borders and rock gardens, forced pots and bouquets. Bulb size: 5 cm/up. May. 16” to 24”. HZ: 6-9.
The Flowering Onions
are rabbit-, rodent- and deer-resistant, and are seldom affected by disease. Adored by bees, butterflies and pollinators, Allium extend the spring flowering season, and are valuable cut and
Allium require rich, well-draining and neutral pH soil and can benefit from a summer dry period. All Allium must be planted outdoors in the fall after the soil has cooled down to around 55 degrees F (normally after two weeks of night time temperatures hovering around 40 degrees F).
Plant 4" deep and 3" to 4" apart.
We are very sorry, but due to state agricultural restrictions, we are not permitted to ship Allium bulbs to Idaho, or to the following five counties in the State of Washington: Adams, Benton, Franklin, Grant and Klickitat.
Alliums are The Art & Soul of Spring and Summer! Allium Horticultural Tips