Allium thunbergii 'Ozawa'

Tried and Trouble-free Recommended by 2 Professionals
Common Name: ornamental onion
Type: Herbaceous perennial
Family: Amaryllidaceae
Zone: 4 to 9
Height: 0.75 to 1.00 feet
Spread: 0.50 to 0.75 feet
Bloom Time: September to October
Bloom Description: red-violet
Sun: Full sun to part shade
Water: Medium
Maintenance: Low
Flower: Showy
Leaf: Fragrant
Tolerate: Deer, Drought


Easily grown in average, medium, well-drained soils in full sun to part shade. Best in full sun. Plant bulbs in fall or early spring. Plant seeds in spring.

Noteworthy Characteristics

This diminutive ornamental onion is a rhizomatous, bulbous perennial which grows in a tuft to 9-12" tall. It features thin, round, grass-like, hollow green leaves which remain attractive throughout the growing season. Red-violet florets in 1-2" diameter globular clusters appear atop thin scapes in September and October. Leaves turn an attractive tawny orange at frost. Leaves have a typical onion smell when bruised, but are not used for culinary purposes.


No serious insect or disease problems. In flowering decreases over time, tufts should be dug up, divided and replanted.

Garden Uses

Group or mass in rock gardens or border fronts.