This plant does well in my zone 7a garden with some protection. It dies to the ground in the winter but reemerges just fine in the Spring. It grows in the partial shade of a taller rose bush and thrives. It has not yet proven to be invasive here.

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I've grown these perennials for many years. As always, it's mid July and here come the flowers. Because they die back to the ground each winter even here in zone 9, they return and grow from April till July to be a two to 3 foot plant before starting to flower. I have the tall purple and the pink, which are so pretty in a mixed bed. I had them take over one year and it took 3 years to manage them again through pulling, cutting immature seeds, and even "Round-Uping" them. It's a shame they overpopulate because otherwise they are disease and bug proof beauties that attract bees, butterflies and hummingbirds.

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This plant can become very invasive. It has for me, popping up in numerous potted plants. It has a very tough root that is hard to pull out once it gets going. However, it is a pretty plant. Just be sure you want a lot of them because they will spread all over.

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