I deadhead in the fall & trim them into a nice mound. I've found that it's important not to prune down into the woody part of the lavender bush. I have heard of lavender coming back from the woodier base, but in my experience that hasn't happened. I think I've read that one shouldn't cut more than a third of the bush back. I've always heard that lavender are short-lived plants. I have several that are five years old & going strong. I don't have a good track record when I transplant them after they've grown for a few years. I live in a mediterranean (very dry) climate, which they seem to enjoy. Years ago, I definitely killed some by overwatering, so I think that good draining soil would be important, but you're so successful with succulents that I know you can provide that! Good Luck - I can't imagine having a garden without lavender...
