What is in the seasoil potting mixture? I suspect you may need some lime in your soil to help with calcium/magnesium, and you will need something to get rid of the mites. since it is outside, I would use a combination of SNS217 and Azomax.
Morbloom seems to be more of a bud enhancer than a bloom fertilizer. With a N-P-K of 0-10-10, I just don't think it is giving your plant what it needs. While the need for N goes way down in flowering, IMO, you still need a food that has some N in it.
I agree that the spots appear to be spider mites and agree with Hush that a mix of Azamax and SNS 217 to combat them.