|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.|
3 In stock
Originating from N Mexico
This is an exceptionally distinctive, single trunked species with a magnificent, almost spherical head of very narrow, flexible, powder blue leaves. The dead leaves remain in the stem for several years and turn a very pleasing straw colour, like an Hawaiian grass skirt. Unfortunately the leaves are usually removed before export. In summer a flowering stem, up to 60cm long may rise from the head, and bear panicles of creamy white flowers.
An extremely hardy species, surviving temperatures as low as -10 degrees centigrade, possibly lower. Prefers full sun and good drainage.
Height and spread after 4 – 5 years 80cm x 50cm
Semi mature height and spread after 10 – 11 years 1.5m x 50cm
Potential height and spread after 25 years 3 – 4m x 1.5m, width is dependent on flowering and subsequent branching.