Could I start using molasses on a 3 day old at 1/4tbsp per gallon and slowly work my way up to 1tbsp or should I wait until flowering? Doing 12/12 from seed btw
That would depend on whether or not you are using beneficial bacterium or mycorrhizae in your soil. Most of them are carbon feeders and readily feed on sugars and quickly multiply. A well established colony lives in sybiosis with the roots. These are so efficient at it that they break down nutrients into forms much more readily absorbed by the root system, resulting in a much healthier plant.
General opinion appears to be to wait until they are flowering - or even until the last 2 or 3 weeks of flowering. But I would love to hear of any results you may get.
I would not advice adding any kind of pk spike or mallasess untill about week 4 let the plant get used to the change of the light scedule before adding any other addatives i have added mallaess early but it just made the crop's end result a little harder to burn be very careful when adding any pk spike has crops can be easyly spoilt by doing this too early.......................tyke..............................