Round-headed leek (Allium sphaerocephalon)
This is a striking allium with tall slim stems bearing dense green drumstick-style flower heads which mature to maroon-red. It’s a great choice for growing in a mixed herbaceous border among ornamental grasses, or gravel gardens. It also works well in a pot. Best ti use in large groups (min 20-25 bulbs).
It remains ornamental in the garden well into summer.
Good cut flower in fresh and dried arrangements.
Favorite of bees, butterflies and other pollinators.
Winterhardy perennial bulb
Height 60-90 cm
Width 10-60 cm
Spacing 5 cm
Flowering time July-August
Site sunny, well drained, chalky, sandy soil
Propagation seeds, bulblets