Did you start your plants in a 5 gallon bucket or whatever they are in right now? Why don't you get some clones from someone that way they are already about 8-15 inchs and they are rather cheap and you don't have to deal with the issues your having. I wouldn't ever use miracle grow I've heard alot of bad things about it, but hey my setup wasn't perfect nor did i not have problems, I had a ton, and still dealing with them months after, but you learn new things, and get new ideas to improve your plants, grow, and setup and overtime you will get it and be happy, I'm pretty surprised with my first grow as I've got several oz's on them so having anything is always good and tells you your doing something right. I would also get a a/c unit because 90 and 100's are too hot, they say keep it about 70-80 degrees, I almost killed a lot of my plants due to the heat issues until I got a air conditioner.