I don't know much about bamboo. I want to use it for privacy and some shade. I am looking for a bamboo with at least 2" culms that are showy and a plant that grows at least 30' tall that has a hanging tendency at the top. I would prefer something that is not going to take over. I want it in several areas of the yard in two clumps of 6'X 2' and a clump of 4' x 4'. I am in hardy zone 8 Abbotsford, BC. Perhaps it would be best to have a variety that is hardy in Zone 7, not 8 though as I don't want to lose it if I have a very harsh winter for this area. Thank you. Steph.