Question
Is there any information anywhere that would list different perennials and describe how much they spread over the years?  Some seem to be slowly spreading and some become invasive.

Answer
Hi Neona,
Thanx for your question.  Here is a list of invasive perennial plants from the University of Vermont.  Depending upon where you live though, this list may not be all-inclusive.  There are perennial plants that live in Kansas or Texas or California or Florida or Montana that don't grow in the Vermont.  Can you give me your general location and I'll try to be more specific?

Here is the list from the University of Vermont.

http://www.uvm.edu/~pass/perry/oh65inva.html

I hope this helps.
Tom