Trying to make a formula of veg time isnt going to work.The time necessary for a worthwhile grow during veg has too many variables.Everything is by unique observation.My last grow was 20 Apollo 11's.In that group(all seed produced from 2 of my plants) I had extreme variations.Combine this with the natural growth drop off after each Topping and Pinching, youll never force it to a schedule.You must develope an approach and an eye for doing whats best for each plant and the group.-usdi Agaluga