Hi Im new to GC forums and could use so help guys. This is my 1st jack grow. I'm 3 days into 12/12. There 20 inches tall and seem to be very bushy. Do I prune or just leave them to grow. Ps there under 600w dual spectrum bulb. Would appreciate some info guys. I also have an issue with roots overgrown my nft tray and are starting to grow into my resivoure is this an issue?