Nooo do not cut the fan leaves. I would say the miracle grow is too hot for most MJ. I wouldn't say that you can't use it but I don't recommend it. It looks to me to be some overnuting on the one plant and MG is notorious for that. You would do better to get some tomato ferts if you can't get real MJ nutrients.
I would also agree that you have a bit of stretch there from not having enough light. If you don't have the space to run regular HIDs or high output floros then check at lowes for the large 200w CFLs or order some online. You need to achieve 3000 lumens per sqft while in veg to prevent that stretch, and 5000 lumens per sqft for flowering to get nice buds.
If you want to see those plants turn into bushes? go to the top of the plant and gently push open the topmost growth to expose the young leaf bud that is just beginning toi emerge. Take clean fingernails and try to pinch out 3/4 of that little bulb of leaf growth without cutting off the whole thing. If you don't get it exactly right don't worry. In about a week you will know if you got it right as the upward growth of that shoot will stop and all those little side branches will explode outward and upward. Within 3 weeks max you will have a bush where once you had a mini pine tree.
