The plants are not looking that good. They lack vigor and have red / purple stems. The mothers in the middle definitely have depleted soil and a thorough lime green hue on the leaves. The back mother has some red hue on the serrations of the leaves. The plants to the left and right have a couple of rust spots in some of older leaves.
My plants are showing red / purple stems as well as some rust spots in some of the older leaves. Nitrogen deficiency? Or lockout due to too much fertilizer?