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Serene M. I live in the PNW and white pet blooms in shade for me starting in april until frost and even then she sometimes puts put out a little flower or two in winter if it is mild.
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E.A. Hardiness Zone: 6
I have white pet in a pot and she seems very happy there. Big flushes of little white blossoms with a vaguely soapy fragrance. Not a five star plant for me because her foliage is a bit lackluster and when the blooms are spent, they turn an ugly brown wilted color and require vigilant deadheading.

