What could this be?

calvin.m16

Well-Known Member
Maybe calcium deficiency.
calcium deficiency caused by lack of Calcium or a pH issue in the rootzone. I'd do a "slurry test" to factor out the pH issue (just mix 1 part soil to 1 part water and stir, let sit for a few minutes and test pH). If your pH isn't out of range 5.8-6.4 then I'd suspect a deficiency of Calcium in your feed or soil.
 
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