Purple Ornamental Kale: Replacing my Geraniums Outside

I put three of these in planters in my front garden after digging up and replanting my red geraniums to overwinter in front of the sliding glass door downstairs. When the long curtains are closed, that area becomes a greenhouse and the geraniums love it. I have always preferred ornamental kale to mums outside in the fall because they are cold tolerant and are still going strong long after the first hard frost zaps the mums. 

xo