William, thanks for the information. That's all news to me and very interesting. Thats amazing how far they will climb. Reminds me of a passion vine my husband planted. It has gotten in all the trees and bushes. it wraps around the limbs and almost impossible to get them out. The bad part is the vine goes under ground also and sprouts up all over. If you try to pull one up it breaks off. The only good thing about the passion flower is it smells so nice and has a very pretty blossom. It's saidto have the appearance of Christ's wounds and crown of thorns. Lois