For a general idea, I planted three close together 7 years ago. They are now a mass about 20' x 20'. They grow fast, spread fast, and they are wild looking. I am not a big fan as I have to tear it up and beat it back every year now.

You should be able to see these growing in many many commercial landscapes.

I don't get the impression that they take off the frist year or two, but once they do they spread quite quickly.

Its the type of plant that will require annual maintenance to keep a nice clean look.

I planted 3 of them on a dry slope a few years ago...I left that place last year. I'd be curious to see how big they are now that they are established.

Thanks for the responses. I cant wait to see what happens to the two that I planted in the upcoming years. If anyone has any photos I would love to see them. I have never seen them in residential landscaping, or if I have, I didnt know whatI was looking at.

I planted some in a part-shade area and in a few years they got too wide for the area -- maybe around 10' wide or so. I tried to dig out the ends and transplant them to a sunny slope (and discard the main plant), but the roots were tiny and not much of them made it planted late in the year. I bought another 2 last year. This year they are still shrubby looking. Probably next year they will start spreading their "wings" and taking over the hill. I will look for a pic of them, but I think I don't have any.

In their part-shade location they did not get good color. They were so much more colorful in fall last year in the sunny location.