Oak leaves half yellow / half brown - Ask Extension
Hi. Our oak drops its brown leaves every year, as they do. This time I've found several unusual leaves, bicolor. Different colors on both sides of the...
Knowledgebase
Oak leaves half yellow / half brown #948039
Asked November 02, 2026, 6:22 PM EST
Hi. Our oak drops its brown leaves every year, as they do. This time I've found several unusual leaves, bicolor. Different colors on both sides of the leaf's spine. Disease? insect? Inquiring mind...
Montgomery County Maryland
Expert Response
This is probably just a quirk of physiology or characteristics within those particular leaves, although we can't determine the exact cause. That said, it is not due to any pest or disease we are aware of, as they cause very different symptoms (and much earlier in the year than only in mid-autumn).
Miri
Miri
Miri, Thanks for your prompt reply. Mystery….
Mary Means
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www.marymeans.com
From: ask=<personal data hidden> On Behalf Of Ask Extension
Sent: Tuesday, November 3, 2026 9:09 AM
To: Mary Means
Subject: Re: Oak leaves half yellow / half brown (#0217953)
You're welcome. I've seen the leaves of other species (like callery/Bradford pear and maple) develop interesting patterns during their fall color changes too.
