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Potassium (K) deficiency
Eric Hanson, Horticulture
Symptoms of K deficiency occur periodically and include tip dieback of shoots, scorching along the leaf margins, leaf cupping or curling, and necrotic spots. Symptoms are similar to those caused by acute drought stress. Younger leaves near shoot tips may develop interveinal chlorosis similar to that caused by iron deficiency.
Early stages of burning along leaf margins (left) and advanced marginal burning caused by K deficiency.

 

 
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Last Updated - 6/22/07