One thing you might want to try right now is bending. Bend the top over enough so the top is below the tips of most of your secondaries. This will stimulate growth of the secondary branches and hopefully increase your yield in the end.

Why aren't you using any nutrients?

Read through the other thread but didn't see any mention of genetics...is this from bag seed? I'm asking because your plant appears to be Sativa.

You might be able to get some decent bud from this plant...good luck

Dboy