Hey guys, just going on about my 6th week of veg, and they are all about a foot or more tall, i wanna veg a little longer because i have pleanty of vertical space, a few of my plants have started yellowing up around the bottom, just wondering if i should jus leave them be or trim them up....i used miracle grow potting soil and i think it is a little nute burn....so also why i am mentioning that i am thinking to transplanting to scotts potting soil or something without the time released ferts and putting them from their 3 gallon home to a 5 gallon home....any advice on any of these subject would be greatly appreciated.....thanks!!