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Extension > Garden > Diagnose a problem > What's wrong with my plant? > Vegetable > Broccoli > Discolored head

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Broccoli > Head > Discolored head

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  • Image: Black Leaf Spot/Gray Leaf Spot 1
  • Image: Black Leaf Spot/Gray Leaf Spot 2

Black Leaf Spot / Gray Leaf Spot
Alternaria spp.

  • Gray to black round leaf spots with concentric rings
  • Leaf tissue becomes dry, brittle and often falls out, resulting in a ‘shot hole’ appearance
  • Leaf spots often appear first on lower older leaves
  • Broccoli and cauliflower heads may develop dark brown irregular sunken areas
  • More information on Leaf Spot...
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  • Image: Black Leaf Spot/Gray Leaf Spot 1

Boron Deficiency

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