My buddy swears on molasses and he uses it every other time he feeds. I've tried it once, I was too afraid of something unexpected so never tried again, and I never saw and improvements or harm done.
NOOOO, use molasses! it's great! black strap molasses, I thought everyone knew that. no offense intended of course, great with micros, and a super potassium food. In fact black strap molasses is good for HUMANS as well, kinda strong tasting though.... but I know a yoga girl (mmmm yoga girls.....) oops sorry... yeah, I know a yoga girl that has a spoonful every morning, and I can safely say she tastes fantastic.... Oh, makes a nice plant food too. Kinda got off topic there...
I wouldn't use it that often though, it can make the herb burn funkily, and you can have sulfur probs too.
Once a week is safe through the first 4-6 weeks of flowering, depending on the strain, mix a good phosphorus food in there too, and some worm castings, I also like squid emulsion but that's some smelly stuff, but my girls like it, also maybe like a bat guano or seabird guano For phosphorus, and if you are outside, the added N in the seabird guano is helpful for the plant outside, damn near all outside plants are slightly N deficient with the almighty sun shining.