These little brownish yellowish spots appeared on two of the shade leaves of one of my plants (older growth). Both leaf septoria and calcium deficiency are fairly similar in regards to how the plant shows symptoms so I’m struggling identifying the problem.
Plant is one of five autoflowers 55 days old. Not using any other nutrients outside of what was in the soil
I’ve been adverse to pruning the autos outside of taking off some dead leaves at the bottom of the plant.