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Dealing with petunia purpling problems

Added on 11 March 2024

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Dealing with petunia purpling problems
Lower purple leaf discoloration resulting from phosphorus deficiency and cold growing. Photo: Brian Whipker

From rooting to finishing, there are a wide range of reasons why petunias might display purple discoloration. However, the location of occurrence and the stage can help diagnose why the discoloration is occurring.

In a recent eGRO alert, Patrick Veazie and Dr. Brian Whipker of North Carolina State University explain that anthocyanins are secondary metabolites in plants that are responsible for the red and purple colors. 

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