Thank you both.
Another thing I forgot to mention is that I keep getting leaf curl stress on the bottom leaves whenever I use my fertilizer injector, even though there is no fertilizer in the soil. It happens both with the Cal Nitrate and the 4-18-38. I'm going to lay off the fertigation for a while. The plants don't seem to like it.
My theory is that I have a soil high in humates and other nutrient uptake accelerators. That's what I wanted, but I am finding that it's extremely easy to over-fertilize. Maybe I will try some molasses next, instead of chem ferts.
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