Rhizotonic worked wonders for me in veg, i should of stuck with it all the way through really but ran out and didnt bother getting anymore!
As for superthrive, that worked a treat aswel, remember though when your using ST only supplement the plants with it as a "treat" every now and again. I gave it them once a week, i mixed a drop into ten litres of water. Also Do not use ST in flower because it will slow down the flowering process! Hope this helps
Deejay