I wouldn't have thought there'd be enough room, but it depends which one you want to use, and whether you're keeping it stooled or not.

Bamboo what does stooled mean please?

Oh I'm sorry - it means something that you keep constantly cut down, so in the case of Cornus, for instance, usually one with coloured stems, you'd hack it back down to almost ground level in the spring to encourage the growth of nice, new red stems for display during the winter. That obviously stops it getting 15 feet by 15 feet...

ok thanks for explaining