|1||15C+||Indoor||Grow as a houseplant or under heated glass.|
|2||10 to 15C+||Indoor / Outdoor||Grow indoors, or outdoors in summer in a sheltered spot|
|3||5 to 10C||Tender||Grow outdoors in summer, and in a heated glasshouse in winter.|
|4||1 to 5C||Tender||Grow outdoors or under glass without risk of frost.|
|5||-5 to 1C||Half-Hardy||Hardy in coastal/mild/sheltered areas. Will not tolerate hard/sudden frost. May require winter protection in situ. such as fleece or straw mulch.|
|6||-10 to -5C||Hardy||May suffer at altitude, central/northerly locations, harsh winters, cold gardens and when grown in pots.|
|7||-15 to -10C+||Hardy||Will survive most severe winters but may be at risk in central/northerly locations and in pots. Top growth may be destroyed but will usually re-grow.|
|8||-20 to -15C||Hardy||Will survive severe winter, but may need protection when grown in pots.|
|9||-20C & Colder||Very Hardy / Hardy||in the severest European climates.|
29 In stock
Originating from Japan
A rhizomatous perennial with dense tuft of evergreen, black, glossy, strap-shaped leaves and tiny bell-shaped, purple, Muscari-like flowers in summer followed by black fruits. Essential for lovers of dark leaved plants – this is the blackest of all. It slowly forms a spidery carpet but can look lost on bare soil. Wonderful however when planted in gravel amongst spiky plants. It is evergreen and is the ultimate low maintenance plant, requiring no attention to stay clean, fresh and glossy all year round.
Grow in moist but well-drained soil in sun for the blackest leaves.
Height and spread after 2 – 3 years 20cm x 20cm
Semi mature height and spread after 4 – 5 years 20cm x 60cm
|Season of interest|