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Heirloom Tomatoes in Rockwool - My first setup
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07-15-2014, 02:34 PM
Stan
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Join Date: Apr 2011
Posts: 213
My guess it might be a Potassium/Calcium deficiency but not 100% sure without being able to actually see the full plant. I know my tomatoes usually need extra Potassium/calcium as the fruits start to grow.
Stan
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