Allium (F)
Hardy in Zone 4 and above
All thrive in sun and will tolerate some shade. Make sure that soil is well drained. The tall varieties should be planted in groups of at least 3 bulbs toward the back of the garden: the shorter varieties in groups of 6-10. Plant 20 cm bulbs 10"-12" apart and 6" deep; 10-12 cm bulbs 8" apart and 4" deep; smaller bulbs 3"-4" apart and 3" deep. Alliums are drought tolerant. The foliage of many larger alliums, withers just as the plant blooms, so plant behind bushy perennials, such as daylilies.
There are two types of Alliums; those that have leaves that die back after flowering, and those that have leaves that remain green for most of the season.
Leaves die back after flowering:Globemaster, Gladiator, Galaxy Flower, Allium christophii, Sicilian Honey Garlic.
Leaves remain green for most of the season:Allium atropurpureum, Blue drumstick, Jade eyes, Allium roseum and Hair.
