Skip to product information
Allium thunbergii ‘Ozawa'
1/2
  • Allium thunbergii ‘Ozawa'
  • Allium thunbergii ‘Ozawa'
Allium thunbergii ‘Ozawa'

Allium thunbergii ‘Ozawa'

Ozawa Onion
ALLIUM (Liliaceae) ornamental onion

Allium offer clean vertical accents in the border, with rounded or domed flower heads held above the foliage. They are straightforward to grow in full sun and freely draining soil, and their simple, architectural shapes work easily with a wide range of perennials and grasses. As the flowers fade, many species leave dry seed heads that persist well into autumn, carrying the season quietly forward. The mild onion scent in the foliage helps deter browsing wildlife, adding to their reliability in both designed and naturalistic plantings.

A late-blooming ornamental onion valued for its glossy, dark green foliage and compact form. Dense purple-red flower heads appear from early autumn into mid fall, bringing colour when most alliums have finished. As the season cools, the foliage shifts to yellow and orange tones, extending the plant’s visual interest. Dried heads persist well into winter and remain tidy. Clumps stay narrow and upright, showing no self-seeding in the garden. Performs best in full sun with well drained soil and pairs naturally with smaller and medium grasses.
Pot size
$9.00
Out of stock
Growing Conditions

Light: full sun

Moisture: average to dry

Soil: well drained; accepts sandy or lean soils

Hardiness zone: 5

Maintenance: low; remove spent foliage in spring; dried heads may remain through winter
Size & Habit

Height (cm): 40

Spread (cm): 10

Habit: narrow, clump-forming perennial
Seasonal Interest

Flowering period: Sept–Oct

Seasonal interest: early autumn bloom; foliage colour shift in fall; dried heads in winter

Foliage: dark green; yellow to orange in late fall

Flower: purple-red
Ecology & Notes

Wildlife value: visited by autumn-active bees

Deer/Rabbit resistance: yes

Habitat: sunny borders; gravel gardens; autumn plantings; among low and medium grasses

Features: glossy foliage; purple-red flowers; autumn bloom; foliage colours in fall; persistent dried heads

Notes: no self-seeding observed; strong late-season presence; effective with fine or upright grasses

You may also like