It's more likely the environment : the type of light ,main pots medium ,frequency of watering,pheno and nutrients used than the starter plug. Like I mentioned above about my plants being behind in flowering. Every grow is different. I do like running my temps a little higher than most. Under LED the plants don't seem bothered and I think it increases transpiration ,frequency of feeding and using a heater means more air intake. Temps are 27-29 highs 20-24 lows.usually at the higher end.
Laters