You want to use a afforable but great product, go with Fox Farm Grow Big for Veg and Fox Farm Tiger Bloom for Flower. Now in a store they are $20. but online you can find it for 14-17$. So just look around. That will help your plants grow super big.
Hope that helped, if there are more questions go ahead and send them to me, and remember to follow book for the first grow then do not be afraid to experiment and learn what works. Weed grows when ran over by a lawn mower, but when over nuted or over/under watered it dies.
I foilar feed before lights on and I use diamond necter or extreme serene, once a week.