Just trying to figure out how to get started using molasses im already in the flowering stage
In soil I think using biweekly is sufficient.
What are your intentions with the molasses, and what kind do you have or are you looking at?
Less is more with that. I use it every couple weeks for.my soil life. It WILL attract gnats if over used.
I learned this the hard way! 
Ive been using it on autos but only use it as a break from regular nutrients it does attract bugs that’s why it’s off and on for me 1 tablespoon per gal every two weeks in flower
I use to use blackstrap mollasses but I don’t like it. Did some runs on recharge that has mollasses plus other stuff and love it much more. No bugs etc.
If you do use mollasses make sure its unsulphured. Plantation makes a good organic one.
Beet and molasses are in a few organic fertilizers too.
What is the beet good for?
'Molasses (/məˈlæsɪz, moʊ-/)[1] is a viscous substance, principally obtained from the refining of sugarcane or sugar beet juice into sugar. ’