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botanical name:
Berkheya purpurea 'Silver Spike'
Berkheya purpurea 'Silver Spike' © Deeproot Plant Base
synonyms:  Berkhaya purpurea 'Silver Spike'
family:  Asteraceae
characteristics: perennial
height: 0.70m
width: 0.50m
growth rate: medium
growth habit: clump
leaf colour: grey-green
flower colour: lilac
main season: Summer
aspect: full sun
conditions: dry soil, moist soil, sandy soil
preferred soil pH: any
minimum temp: -6°C
USDA zone: 9 to 10
description:
Very prickly basal rosettes of lobed dark grey-green leaves with sharp silvery spines at the edges. Large pale lilac flowers on sturdy erect stems in summer. Forms a deep taproot.

cultivation:
Very well drained, gritty soil in full sun. Drought tolerant, thriving in hot dry conditions.

propagation:
From seed

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