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botanical name:
Allium rosenbachianum
Allium rosenbachianum © Deeproot Plant Base
common name:  Ornamental onion
family:  Alliaceae
characteristics: perennial
height: 1.00m
width: 0.10m
growth rate: medium
growth habit: bulb/corm
leaf colour: green
flower colour: purple
main season: Summer
aspect: full sun
conditions: dry soil, moist soil
preferred soil pH: any
minimum temp: -5°C
USDA zone: 9 to 10
description:
Bulb producing long, strap-shaped glaucous green basal leaves and tall ridged stems bearing 10cm umbels of numerous small star-shaped, deep purple flowers.


cultivation:
Well drained soil in sun.

other notes:
Native to Central Asia.
This species is sometimes confused with Allium stipitatum.
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