for the bazzillionth time, sugars not molasses, not processed sugar, not corn syrup, not maple syrup, not pineapple juice or any other carbohydrate will ever help a plant do anything.
the sugars are good for micro-organisms that live in soil, but not the plant. if you use hydroponics or a sterile system all you will do is grow funk.
molasses has some nutrients the plant can use but the sugars are for bugs. every other sugar is empty of anything plants crave. you would do better trying to force your plant to eat a big mac.
a pant with damaged roots needs time, proper watering, warmth on the root system (not hot, just warm) and sunlight on the foliage. thats how roots grow, and how your plant will bounce back from stress.
any magic potions, will do nothing but cost you money, and with your plant in a stressed state, any sugar will block oxygen from the remaining root system, invite bacterium and pests, turn your soil sour and make you into a bacteria farmer, not a dope grower. let the plant grow.