Strain
Being a first grow there were a few mistakes that stunted them, they never really recovered from that. It is easy to give them Nutrient burn the manufacturers recommended dosage is far too hot for them. Also starting them in a smaller pot made them flower too early before any real vegetative growth happened. Ph definately has to be maintained I found 6.1 in the coco they seemed happiest. Larger pots than the 12 litre ones I use seem to give a bigger plant looking at others!