We've got a 4 ft fence that borders our neighbours garden that we can't do much about, but we'd like some privacy in certain parts of the garden. I was thinking of buying some bamboo that grows to 5-6ft to put in pots by our seating area etc. What sort should I buy, and how big a pot? I know it spreads, so if I bought a long trough planter would it spread sideways? I'm completely clueless!