Hello Rye,
I'm glad your plants are getting better. I was waiting to hear about your pH levels and if it was fluctuating, as well as about the actual water and air temperatures before making final conclusions and recommendations. I don't like making conclusions about the specific cause of a problem without having the important information first because unknown factors can make a big difference. So I like to have all the pieces of the puzzle first.
Most lettuce plants are light feeders. I cant say for sure but I would assume kale is a heavier feeder than common lettuce because of the darker green color of the leaves and stems. When growing plants in the same system there are compromises and trade offs, so one or more plant may suffer more than others if their needs are different. I prefer butter crunch lettuce, but you can grow anything hydroponically if you provide the right conditions (both nutritional ans well as environmental).
Last edited by GpsFrontier; 07-27-2016 at 07:14 PM.
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