A chain link fence runs along the back of my yard and every year weeds, trees, and everything else my neighbor doesn't take care of (which is everything) pokes its way through and I'm constantly having to cut and prune these things trying to take over my flower beds. Thinking that if I planted some kind of vines on my side of the fence, I could block his stuff from coming through. So I decided on Perennial Pea. Vigorous growth with numerous flowers, I figured this was perfect. So in they went. The first year seemed fine, they made it up to the top of the fence and had flowers here and there. Second year they went crazy. Growing everywhich way, through my shrubs, around my annuals, everyplace except up the fence. I had to tie every stalk to the fence in order to get it to go up instead of out. This was begining to be a lot more work than cutting the neighbors weedy crap. I tried pulling some of it out. Didn't work. Couldn't pull them out no matter how hard I tried. Left them in. This year I just took one piece of twine about 6 feet long and attached it to the fence at two different spots stuffing all the vines together. Now it's a lot harder to cut the weeds and trees still poking through so I left them there too. It's begining to grow on me.
Flowers do look kinda cute in the vase, though.