Blackstrap molasses is the best to use. I am using the full flavor version since i couldnt find blackstrap, i mixed it with a bottle of water and heated it over the stove to make it thinner and more easier for the plants to absorb. Most of the nutrients you buy are made of molasses to begin with, they probably work a little better than just molasses but are like 3 or 4 times as much. Molasses has tons of calcium and trace minerals also Brown sugar would do something for plants but probably not nearly as well as molasses. Bud candy, Carbo load, flora nectar, and Sweet all have Carbohydrates and sugars for plants.