Zantdeschia hardiness

Alberto Castillo
Sun, 14 Jun 2009 12:41:05 PDT
In Britain they grow exra hardy clones, obtained from colder areas in the wild. 'Crowborough' is very well known.


Z. aethopica is a marsh plant in the mild original habitat of the Cape and goes dormant in summer. True that in a WARM climate they remain evergreen if kept on well watered. 
> British garden books (the main kind we used to have) recommend 
> growing it as a shallow aquatic to enhance its winter-hardiness. I 
> sometimes see other callas offered as water-garden plants, but as far 
> as I know none of them is winter-hardy here in Zone 7 or 8, or 
> whatever we choose to number it."

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