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14.07.2024 - 18:18 / gardenerspath.com / Kristine Lofgren
How to Identify and Treat 9 Common Dahlia Diseases
When my ‘Labyrinth’ dahlia is in bloom, it’s truly one of my favorite flowers in the garden. How do you top giant, foot-wide flowers in an explosion of pink, salmon, orange, and cream?
I love them so much that I have replaced my plants not once, not twice, but three different times because of disease problems.
I love dahlias, but some diseases that affect them can be a real nuisance.
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Over the years, I’ve learned many techniques to avoid the problems that can plague these plants.
As is the case with many diseases, prevention is always best, and that’s especially true when it comes to dahlias.
Many of the common problems can spell the end of your dahlias. No do-overs, no cures, just digging out and tossing your once wonderful flowers.
A few diseases can be cured or otherwise dealt with, but prevention is the way to go.
In our guide to growing dahlias, we cover how to cultivate these beautiful blooms in your landscape. Healthy specimens are less likely to fall victim to infection from pathogens than those that are stressed or otherwise grown in suboptimal conditions.
In this guide, we’ll discuss nine of the most common diseases you’ll come across.
Here’s the list of the diseases we’re going to talk about:
9 Common Dahlia Diseases 1. Aster YellowsAster yellows is caused by a phytoplasma spread by leafhoppers.
When infected, the plants will have strange growth, such as witches’-brooms, distorted stems, and discoloration of the foliage and flowers.
Unfortunately, once your dahlia is infected, you can’t cure the disease. Since it can spread to other species in
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