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Rhododendron Plants

Q.Why is this “Skookum Rhododendron” suffering, when the one next to it is fine.

Zone Amherst, Massachusetts | Anonymous added on May 10, 2020 | Answered

They are planted 3 feet apart.
Should I “replant” it using different soil?

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Certified GKH Gardening Expert
Answered on May 14, 2020

The other one must have a perfect spot. Proximity doesn't seem to matter when it comes to environmental problems or disease. I would start with a soil test to see if the pH is between 4.5 and 5.5. Is it possible the soil's acidity is different between the two? Also, is drainage different? They require well-drained soil. I see spots on the leaves of both shrubs. Is that dirt or a disease or bugs possibly. I would check all those aspects. The soil test will also tell if something is wrong nutrition wise.

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