Molasses is a better choice for bulking-up the buds. It's a great carbohydrate source, carbon source, and has calcium, magnesium, iron and micronutes, all of which are a benefit to the buddage.

At this stage, you'll want to flush-out the nutrients from the soil, and perhaps quit the nutrients altogether, depending on the strain. If a long-flowering sativa or sativa dominate, (9-13 weeks) perhaps half doses of nutes till ready for the final flush. If a short flowering indica or indica dominate, (7-8 weeks) I'd stop the nutes, flush, and only add unsulfured molasses from this point forward. (I use 1 tsp per gallon of properly ph'd water)

Let the plant scavange the mobile nutrients from her warehouse of mobile nutrients. (the fan leaves, for instance)

Extra N tastes crappy.