Mould? How to deal with it please
I've come back from holiday to find these plants in a very sad state. I think the hot weather has scorched the leaves? But what might have eaten the holes in the leaves, and what is the dusty orange/yellow mould? Many thanks for any help!
Slugs /caterpillars for the holes, and rust for the foliage.
Can't help with the remedy for rust - I don't know which plant you have, but pests and diseases are more common when plants are under stress.
Slugs are common, so it's a case of picking them off and dispatching them, and caterpillars are food for other wildlife, so they can be picked off for the birds, or just left.
It depends how wildlife friendly your garden is, or whether you want to use chemicals.
It's a place where beautiful isn't enough of a word....
I live in west central Scotland - not where that photo is...
They are prone to rust anyway. Weather conditions can bring it on more than other years. Especially cool damp spring temperatures, but unlikely to kill your plants.
The sun will not have helped but burn your leaves out. I would just cut out all the foliage.
The main plant I can see is Oxalis triangularis ... I agree with the others ... cut the plant hard back ... I would then gather up and burn or bin all the affected leaves ... water it very well ... a bucket full wouldn’t be too much ... and mulch. If we get a fine autumn it’ll spring back into lush growth ... if not it’ll be fine next year anyway.
Next year give it a bucket full of water before you go away to help prevent the risk of it drying out again.
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.