What's the deal with these new hybrid willows?
I've been reading about hybrid willows on a lot of the online nurseries. The pictures look the same, but the details vary. Some say they grow anywhere from 6'-20' per year. Some say they can get 100' tall and 40' wide (I don't buy it). One the other hand, some say they will only get 8-15' wide (5' wide if you plant them in a row). I'm not sure which sites to believe, if any. Are they invasive? Can I plant them on a border between neighbors without worrying about baby willows cropping up in their yard? Do they get out of control like bamboo? I'm thinking about planting them between my house and a next door neighbor, but I don't want to tick him off if it is going to spread majorly into his yard.
Any thoughts on this shrub, or which online nursery to use? The prices vary drastically as well. One sells 5 for $8.00 total and another is selling them for $20.00 each (same size). I have heard of these nurseries before.