Mine is in very thick red clay at the top of a slope in full sun. We're hot and humid all season after May, sometimes it rains nonstop, but they've gone weeks without, too. Perfect conditions, apparently. I've had this since 2016 at least. After the first plant, I've always just let seedlings grow where I like and pull the rest. Eventually the older ones die (I think after two seasons or so), but there are always at least a couple seedlings. Still a vivid lime green, and the flowers show beautifully against it.