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Never seen this, zucchini
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May 30, 2020
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Patihum
Tomatovillian™
Join Date: Feb 2013
Location: Southeast Kansas
Posts: 878
Potassium deficiency results in curled, puckered or cupped leaves that may develop a yellow discoloration. The leaf margins will begin to die and fruit develops abnormally. Potassium deficiency generally affects the older leaves first.
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