I bought them from Evergreen gardenworks as seedlings 8 years ago. They were briefly planted in the yard in MA...like 6 mo...but were dug and moved south in '09'. They spent a year or two down here in pots, but they've all been in the ground at least 5 years. They grow like weeds here. I wish I had a few more because I wouldn't cut back every year...I'd love to let them go for a few years of unfettered growth and see what I'd have then. Hmmm, it's almost planting time