Erica Vale Seeds - Nodding Pink Lily Available Australia Wide When to sow Spring / Autumn Sowing Germination Easy (14-21 days) Description: Allium Cernuum This exquisite native of North America has been a prized possession of the lucky few since before the turn of the century, as seed was rarely available. Now you can own this charming beauty with its heads of 10-15 rich lilac-pink blooms nodding on stems arched over its grey-green foliage. Finally turning to ornamental seed heads for dried flower arrangements. Growing to 40 cm. When to sow: Early Spring to Autumn.