And-a deficiency surfaces-
I have a Calcium deficiency showing 2/3 way up the plant- the reasons may not be the soil, as the TDS was 36pm which indicates not much Calcium- and I have always supplimented my water, as if it was reverse osmosis water-
Another cause could be from using low pH water of 6.0 for the plant in the beginning and Calcium is only available to the plant above 6.2 pH. (root zone)
The lowest leaves have started to yellow and the new growth looks normal at this point.
I had already increased the pH of water going in, to 6.5 pH
I'm torn with adding the Calcium or continue the grow and perhaps increase the water pH again- in an attempt to get the root pH to 6.2 pH.
If I add calcium I don't think it would negate the "just water it" mantra.
At the same time, I'm not sure how much Calcium is needed at this point of the grow and will do some research.
Plan: increase water pH closer to 7.0pH along with research of when the plant no longer needs much Calcium.