I came across this plant but done in different colours and what a stunner and they're selling them on ebay already mixed at £12-49 a bush
Does make a striking color statement but don't go spending more money on it than three individual plants would cost.
Eileen I must be getting worse when going to gardening centres or not taking proper notice on certain plants but I've never seen them before and it looks like they'd be ok in my garden next year as my Astilbes didn't look to good today. Good point toni as I've paid the earth in the past to find out an individual plant in several colours would have been cheaper.