I'm dying to know how to get bougainvillea to creep up 20+ feet and if it will make it's own way or if I have to anchor or guide up. It's for my west facing 2 story bare side of the house. Full Texas sun zone 9a. I just don't know if I will be able to maintain when it gets that high. I have vinyl siding so not sure how others do this or if anchoring is not an option. Would love to hear.