one a week is a good feeding schedule, boy oh boy are you going to get some flack on that miracle grow, your walking the plank.
I have stepped asside from using chemical fertalizers because if you overfeed its sooo easy to burn your plants or better yet kill them.
So i found out about Seaweed extracts/kept Extracts/ you know fertalizer's from the Sea/ocean. They work greeeat! intant results, green flourishing plants, perked up, crazy growth overnight. Also check out Myco (beneficial fungus from mushrooms that make your roots grow crazy). Its really all about the organics man..
Also Molasses is even more beneficial in Organic soil where the soil is more active/alive with organisms because its main purpose is to feed the micro-organisms.
in other words put down the Miracle grow and maybe check these products out
http://www.amazon.com/s/ref=nb_sb_noss/188-0731933-5131167?url=search-alias%3Daps&field-keywords=alska+fish+fertalizer
http://www.amazon.com/s/ref=nb_sb_ss_i_0_7?url=search-alias%3Daps&field-keywords=maxsea+fertilizer&sprefix=max+sea%2Caps%2C139& rh=i%3Aaps%2Ck%3Amaxsea+fertilizer&ajr=0
http://www.amazon.com/s/ref=nb_sb_noss?url=search-alias=aps&field-keywords=maxi+crop+fertalizer
http://www.amazon.com/s/ref=nb_sb_noss?url=search-alias=aps&field-keywords=happy+frog+fertalizer
1st link= alaska fish emulsion fertalizer, good stuff totally organic the bloom fertalizer has some chemicals in it but not much, just some potash
2nd link=maxsea seaweed/kelp fertalizer, great stuff organic based, but not 100%
3rd link= maxi crop fertazlier, really favored on rollitup, Seaweed Powder organic under "OMRI"
4rth link= Happy frog feralizer, organic i think, good stuff