Ask a Question forum→geranium took a sudden turn

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San Diego, CA
Jun 6, 2020 3:27 PM CST
My geranium has developed some discolored leaves and is looking quite sickly compared to the rest. The leaves are yellowing in sections with brown spots and holes. The underside of the leaves have brown little speckles on them. I haven't been able to pin point the problem, so any help would be greatly appreciated!
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Name: Big Bill
Livonia, Michigan (Zone 6a)
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Jun 6, 2020 3:35 PM CST
There are little tiny caterpillars that go after geraniums. The name escapes me. They often hide in the folds of the leaves or up in the buds.
They are so small in the beginning of their life cycle that the bore right into an individual bud and eat it from the inside.
Their poop is dark green to black and this is how people come to realize that they have a problem. The poop, looking like miniature peppercorns should collect on the top part of leaves underneath the flowers.
That is the first thing that I would look for.
Just use a "flower spray" from a big box store.
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Name: Suzanne/Sue
Sebastopol, CA (Zone 9a)
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Jun 6, 2020 3:43 PM CST

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My pelargoniums (true geraniums are entirely different) seem to often look like that with too much overhead watering.
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San Diego, CA
Jun 6, 2020 5:00 PM CST
@calif_Sue Thank you for the insight! However, they are on a drip line and hardly ever watered overhead. I think maybe once a week when it's really hot, I will water them by hand but that's about it. It has been drizzly the last couple days in the morning but I couldn't imagine that being enough to make the plant drastically decline within the week?
Name: sumire
Reno, Nevada (Zone 6a)
Jun 6, 2020 5:59 PM CST
Which part of the plant is effected (or the worst)?

Since it has been drizzly, maybe a fungal infection from back splash from the ground? Or mildew, which would be over the entire plant?

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