Stop pruning right away, because flowering is going to start too soon to give the plant time to recover, and you will lose overall yield by pinching or topping too late in the season.
To beef up your plants, a carbon source (molasses) is a good one, but remember that outdoors you will quite likely attract ANTS, so I would suggest maybe watering the molasses in very well, and maybe even mulching over the area after application.
Bud mass as GD said is dependent on having a good Phosphate source, so find a high P fert for that, and cut back on N.