Rhododendrum leaves curling

Russell Plumb

New Member
The photo above is a coupe of rhododendrons at my house. The one on the right has curled leaves on a 55 degree day. We have seen this on a few properties in the last two day and believe it may be Phytophthora.
Any input from anyone?
We’re thinking Agrifos soil drench of 12oz per 100 gl.


Most well-known member
Could be, or botryosphaeria perhaps. Check your soil moisture too.

Agrifos is a pretty good preventative but once rhodies start to decline here, that's usually not a good thing.

Are rhodies native to your area or plants with similiar cultural requirements?

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