Stunted leaves and yellowing Phlox and Monarda - Ask Extension
We're suspicious of Aster yellows on these plants, but wanted to get a second opinion. They are in the same area where a large group of monkshood was ...
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Stunted leaves and yellowing Phlox and Monarda #873767
Asked June 19, 2024, 12:20 PM EDT
We're suspicious of Aster yellows on these plants, but wanted to get a second opinion. They are in the same area where a large group of monkshood was removed last fall because those plants were infected with Verticillium wilt. I checked the stems of the Phlox and Monarda but no brown vascular bundles.
Ramsey County Minnesota
Expert Response
Good Morning Kristina,
Thank you for contacting the U of M Extension Service.
Please click on the following link from the U of M Extension Yard and Garden website about aster yellows: https://extension.umn.edu/plant-diseases/aster-yellows.
From viewing your photos, I cannot confirm the problem is aster yellows. We've had a cool and wet June so far. Our garden plants are being over watered with littl full sun. I believe the growing conditions are affecting the plants.
I would wait and see what happens when the soil dries and the sun is shining for a while to see how the plants develop.
Good Luck!
