|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.|
1 In stock
Originating from N & C America
Deciduous, clump-forming perennial grass, distinguished by its steely blue-green leaf colour, which takes on tones of violet, purple, burgundy and wine red in late summer. Forms stiff, dense clumps which persist through winter. Tiny, purplish, flower spikelets held in large open panicles.
Grow in moist but well-drained soil in full sun.
Height and spread after 2 – 3 years 80cm x 80cm
Mature height and spread after 4 – 5 years 1m x 1m