Can anyone tell me how tall could I expect arrow bamboos to grow in the southern gulf island area of B.C.? I did ask the nursery owner where the plants came from, and it seems that there are too many variables to guess really well. I don't know how old the plants are. I have two, both in 5 gallon pots at the moment. I would say the plants were about 5 1/2' tall when I got them in April. The new shoots have gone over 6' and are now starting to leaf out. Do they stop growing up when the leaves open? I plan on using them as part of my windbreak at the north end of the garden.