Agreed I would take them all off one, all below the canopy on another and see which turns out for you than you'll have a result to show for the experiment and can choose which method you want to go with every time, or maybe you want to mix it up it's different everytime. if the stem is severed than smoke da bud.i like to call those blockers or the yellowing ones can just go if they are below the canopy because otherwise they will fall off and than you have to pick them up anyways