Every spring after a good start they grow well and then late May the holes start to appear - both black and white and the buds become deformed. It started on my Ann Folkard geranium but is spreading to others now. I have sprayed with an insecticide ut I can't see any insects on the plants.
Have a look at this link to Helen Yemm's article (from years ago) about capsid bugs and then maybe have a Google about these bugs and the affect on hardy geraniums, to see if the symptoms are the same as yours.
Failing that I'd look for fungal problems for geraniums (watch out that articles are not talking about pelargoniums though!).
Personally I think capsid bugs are the more likely problem. Helen Y's article gives you a break down of the life cycle of the bug so you can start a properly targeted and timed approach to spraying if that's the route you want to go down.
Heaven is ... sitting in the garden with a G&T and a cat while watching the sun go down
Thanks, I read the same article and came to a similar conclusion. I don't really want to spray, but the problem has spread so viciously throughout the garden I may have to. Thanks for your comments.
Ann Folkard
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https://www.telegraph.co.uk/gardening/gardeningadvice/3349947/Gardening-advice-Thorny-problems.html
Failing that I'd look for fungal problems for geraniums (watch out that articles are not talking about pelargoniums though!).
Personally I think capsid bugs are the more likely problem. Helen Y's article gives you a break down of the life cycle of the bug so you can start a properly targeted and timed approach to spraying if that's the route you want to go down.
https://www.telegraph.co.uk/gardening/gardeningadvice/3349947/Gardening-advice-Thorny-problems.html
helen yemm telegraph capsid bug hardy geranium
- then the article from 2008 is at the top of the results
Billericay - Essex
Knowledge is knowing that a tomato is a fruit.
Wisdom is not putting it in a fruit salad.