The best success was in a green house as the vines can get 15' and more. I wonder if you could train a couple vines in a spiral and then use the 'renewal umbrella' method to contain it.
I'm just getting into hydroponics but I have prior experience in lighting and understand for a crop like this you want a light that's going to penetrate which leaves you headed towards the MH/
hps's.
<a href=“http://www.homebrewtalk.com/f92/hydroponic-hops-first-year-growth-491453/”>This person grew some really great looking hydroponic hops.</a>
I'm also interested in this. It would be awesome to put a new spin on an age old tradition.