Allium lusitanicum 'Summer Beauty' [sold as Summer Beauty Ornamenal Onion]

 Plant Type:
 Growth Forms:
 Hardiness:
 Deciduous / Evergreen:
 Flower Notes:
Dense, rounded umbels (2–3 in. diameter); long-lasting blooms; highly attractive to bees, butterflies, and other pollinators; flowers remain ornamental as seed heads after blooming.
 Foliage Notes:
Narrow, strap-like leaves; foliage remains attractive through flowering (unlike many ornamental onions whose foliage declines before bloom); aromatic when crushed; semi-glossy.
 Stem Notes:
Strong, upright, leafless flowering scapes; sturdy enough that staking is rarely required.
 Fruit Notes:
Small dry capsules containing black seeds; seed heads remain decorative into fall if left on the plant.
 Ultimate Height:
1.5-2 feet
 Ultimate Spread:
1.5-2 feet
 Bloom Times:
 Light Requirements:
 Soil Water Requirements:
 Soil Notes:
Well-drained soil; highly drought tolerant once established
 Range:
The species (Allium lusitanicum) is native to central and southern Europe, occurring in dry meadows, rocky slopes, and open woodlands. 'Summer Beauty' is a cultivated ornamental selection.
 Maintenance:
 Ecological Functions:

The Purdue Arboretum is a collaboration between the Department of Horticulture and Landscape Architecture and Administrative Operations

Purdue Arboretum, 625 Agriculture Mall Dr, West Lafayette, IN, 47907
© 2026 Purdue UniversityAn equal access/equal opportunity universityCopyright ComplaintsMaintained by Purdue Arboretum Explorer
Contact Purdue Arboretum at arboretum@purdue.edu for accessibility issues with this page | Accessibility Resources | Contact Us