Northern Lights Auto (first timer)

first week of adding nutrients, used fox farm grow big and all plants doubled in size within 3 days, moved light a bit closer this week and starting to see good undergrowth. I will start LST training later in the week with pipe cleaners. Also modified my 5g grow bags as I don't think I used enough soil and plants started hitting sides. Week 3 seems to be a success, started LST half way through the week and have some significant undergrowth starting, taking a suggestion and moving my light up to get some higher growth and raise the canopy.