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botanical name:
Allium aflatunense
Allium aflatunense © Deeproot Plant Base
common name:  Ornamental onion
family:  Alliaceae
characteristics: perennial
height: 1.20m
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: -15°C
USDA zone: 4 to 9
Slender, slightly ribbed stems carry large globular heads formed of tightly packed lilac-purple star shaped flowers. The flowers later fade to straw coloured seed heads. Linear mid-green basal leaves.

other notes:
The garden plant commonly offered under this name is actually Allium x hollandicum.
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