You can start supplementing with molasses when your plants would normally start getting nutrients...roughly around three weeks of vegetative growth. I like to feed with molasses periodically during the veg phase, but lots of other growers decide to wait until the plant has been sexed & gone into flowering.

As for the amount, the general consensus seems to be 1-2 tablespoons per gallon, or as Stinky puts it "1 glop per gallon". It can get pretty messy trying to put molasses into a container using a measuring spoon, so many will just drop a half-dollar sized drop into the bottom of the container. Add a cup or two of hot water to the molasses, then mix it up thoroughly to help it dissolve in the water. After that, just add room temperature water to top it off...and your plant will love ya for it! :jointsmile: