Bloom boosters..organic...bat guano extract!
I know its not on your list...but id recomment it if youre looking for organics.
I wouldnt use molasses outdoors. It invites all sorts of bugs and nasties.
You use cal/mag throughout the grow.
Magnesium is a secondary nutrient and weed likes...
Your pH is too low. But plants look healthy, doesnt look like a plant with 5.0 pH.
Soil readings fluctuate. Its a good idea to take a few readings.
You do have Mg def. and youll see P def soon at this pH.
Your wilted leaves look like the plants getting rid of leaves under the canopy. I wouldnt...