|Grow as a houseplant or under heated glass.
|10 to 15C+
|Indoor / Outdoor
|Grow indoors, or outdoors in summer in a sheltered spot
|5 to 10C
|Grow outdoors in summer, and in a heated glasshouse in winter.
|1 to 5C
|Grow outdoors or under glass without risk of frost.
|-5 to 1C
|Hardy in coastal/mild/sheltered areas. Will not tolerate hard/sudden frost. May require winter protection in situ. such as fleece or straw mulch.
|-10 to -5C
|May suffer at altitude, central/northerly locations, harsh winters, cold gardens and when grown in pots.
|-15 to -10C+
|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.
|-20 to -15C
|Will survive severe winter, but may need protection when grown in pots.
|-20C & Colder
|Very Hardy / Hardy
|in the severest European climates.
Originating from Arizona, New Mexico, Texas, Mexico
Looking too good to be true, the beautiful purple colouration of the steel blue pads changes throughout the year, becoming more pronounced in extremes of temperature. It bears large flowers that are a translucent golden yellow, appearing around the edges of the pads in summer. This is a tough and easy-to-grow plant in a large pot, in free draining compost, if watered and fed only when dry during the summer and very sparingly over winter.
It can be moved onto a sun-baked position on a patio for summer and returned to a frost-free conservatory for winter.
Height and spread after 5 – 10 years 1.5m x 1.5m