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botanical name:
Sempervivum 'Black Knight'
Sempervivum 'Black Knight' © Deeproot Plant Base
common name:  Houseleek
family:  Crassulaceae
characteristics: perennial, evergreen
height: 0.08m
width: 0.12m
growth rate: slow
growth habit: mounding
leaf colour: purple
flower colour:
main season: All Year
aspect: full sun
conditions: dry soil, sandy soil
preferred soil pH: any
minimum temp: -23°C
USDA zone: 6 to 9
description:
Medium sized rossetes of very dark, blackish purple leaves, showing the deepest colour in summer.

cultivation:
All house leeks thrive best in full sun and on poor, sharply drained soils. Very drought tolerant and will survive in positions where not much else will grow. Will root into very small crevices, but may need to be secured until established.

propagation:
By off-sets.

usage:
Alpine gardens, sinks and other containers. Will readily establish on walls , rock faces or on house rooftops, which results in its common name.

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