11" height is pretty tight. Here in LA I started 2 years ago with Cascade, Nugget & Magnum. I use wooden planter boxes that are about 4'x4'x4'. I have a small page about my first year here http://titaniumbrewing.com/?page_id=163. The cascade has now busted the wooden box and I will have to plant them in the ground, also this year I am only doing Cascade because it seem to grew best out of the 5 varities I have tried for our climate. You may also want to consider that these plants will grow rather large, if they take off and an apartment balcony may not be enough room. Here is a pic of what I did this year http://titaniumbrewing.com/wp-content/uploads/2012/05/20120502-090149.jpg. The small wooden box is what the Cascade is in.