Does a longer veg time guarantee a bigger yield? I usually do 6 plants at a time, vegging for 4 weeks, this grow I decided to do 4 plants but two didn't work so I've vegged the two remaining plants for 9 weeks, i fimmed them once and topped them 2 weeks ago - they're about 27 inches tall. I've never got big yields (about 6oz the last grow) so on average 1oz a plant...... Should I expect more per plant this time?