Myco-Chum is a excellant microbial product made by Plant Revolution.com (makers of Great White.Orca, King Crab, ect) ( can get samples of)Sugars like molasses feed the microbes.
Microbes feed the plant.
A molasses tea every week or so is beneficial.
Increased microbes in the root zone will increase each roots ability to stay healthy and absorb nutrients.
So yes molasses is good for them.
Stay safe
Bill