Hello guys, this is my very first grow and it has been going smoothly until a day ago. It's been 6-7 weeks so far since I started it and the bottom set of leaves are starting to show yellow spots. I transplanted about a week ago and I'm using miracle grow. Also the bottom two leaves I had ( not the cotyledons) we're dying off(more than 50%) so I cut them off. Not sure if that was okay to do or not. But is my plant not getting enough N or the right pH? Right now I'm just worried about the lower leaves showing these slightly yellow spots. Thank you guys in advance.