Geranium Plants

What Diseases Affect Geraniums?


jbfoley2 added on October 12, 2015 | Answered

Some of my geraniums have scale like spots on the underside of the leaves. The leaves turn yellow.


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ANSWERS
Downtoearthdigs
Certified GKH Gardening Expert
Answered on October 13, 2015

Your plants could have a pest issue or Virticillium can attack geraniums.
In the case of verticillium the plant would need to be disposed of.

Likely the plant just needs some watering adjustment and a Neem Oil treatment generally takes care of most insects or fungus.

Here are some links for you.

https://www.gardeningknowhow.com/ornamental/flowers/geranium/geranium-yellow-leaves.htm
https://www.gardeningknowhow.com/plant-problems/disease/verticillium-wilt-treatment.htm
https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm

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