First of all, you DONT use nutes with Miracle Grow. MG has all the nutes you need within the soil already. If you add nutes to MG before the 90 days nute lifetime you're going to kill the plant.
Oh please.... let's not degenerate to Miracle Grow hating again. Miracle Grow is fantastic. I've used it from day one and it has performed flawlessly.
Where's my hate? I just spoke from prior documented experience. MG soil has burned one of my well-established African Basil plants after transplant and just straight watering. It's done the same to my cannabis plants, even established ones. I have found that their 'guaranteed analysis' on nutrient content in their soils can sometimes be way off. I paid the $50 to get some soil samples tested. MG wasn't the most disappointing, but it was still way higher than what was advertised. SuperSoil was the worst, actually having less than advertised, mostly due to the nitrogen-robbing properties of the wood it was based off of.
I recommend MG for all first time growers because its no fuss and it "just works". A first time grower wants results, not to have to learn the intricate chemical physiology of cannabis and which nutrients (N-P-K) to give in what amounts. Screw all that; get a 5g empty bucket, fill 3/4 with MG Potting Soil, 1/4 Perlite, mix, water, plant seed, watch amazing growth. Thats it! No nutrients or plant problems to worry about.