What’s going on with my Pohutukawa?

Greenman99

Sapling
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The Netherlands
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8
That's too bad.. could be black spot fungus, diplocarpon rosae. I would rule out the cold weather. Have my Pohutukawas in a heated greenhouse during the winter months without issues. Keeping it just above freezing during the coldest nights.
 

BrianBay9

Masterpiece
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Marina, CA
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I don't have a problem with mine left out to the low 30's F. I'm guessing fungus as well.
 

Hbhaska

Shohin
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Oceanside California
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10a
Started my systemic fungicide treatment on all of them. Should have started this a couple weeks ago. Thanks!
 

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