they look awesome but with that yellowing, I wouldn't put any fertilizer on them for a long while. Looks like nute burn. Don't get too excited and start pushing them, they are doing just fine really. I know it's tempting--I'm still a noob myself and STILL have to fight the urge LOL. I wouldn't use Miracle Grow at all if I were you. Tried it myself and killed some of my plants that way last year. I ended up with one
You can get the high dollar stuff (Fox Farms and Advanced Nutrients) on E-bay for pennies on the dollar. I love Fox Farms, the Big Bloom is great for start to finish and I got a 4 oz bottle delivered (shipping and all $8.50) --it only takes a tablespoon to a gallon--the bottle lasts me all season and then some!
fyi, you need to let them grow at least another 8-12 inches or your yield will be terrible. Good luck!