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Lupin-disease or pest
Hi,
I've had a few lupins in my border for a couple of years and this year all but one are progressing nicely. I don't know what the problem is but the leaves are turning yellow at the edges and curling up. It is continuing to grow and flowers
are forming. I've attached a photo and you can see that the lupin next to the dodgy one is normal. I tried a bug spray early on but it made no difference.
Any help will be appreciated or should I bin it
I've had a few lupins in my border for a couple of years and this year all but one are progressing nicely. I don't know what the problem is but the leaves are turning yellow at the edges and curling up. It is continuing to grow and flowers
are forming. I've attached a photo and you can see that the lupin next to the dodgy one is normal. I tried a bug spray early on but it made no difference.Any help will be appreciated or should I bin it
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Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.