Plant has had long period of watering due to rain, is yellowing bottom older leaves and falling off, and rising up the plant. Plants are not droopy from overwatering, but is this a symptom of over watering? highly doubt it is magnesium because have used epsom salts, highly doubt it is nitrogen because plant was flushed 3 weeks ago due to way too much nitrogen, and has been fed quite well with fish emulsion ferts since.