By Barbarak
North Yorkshire,
United Kingdom 
My winter beauty clematis has black spots on some of the leaves. Do they suffer the same as roses? It's only the winter flowering evergreen which is affected . My other clematis (which are pruned) are fine and never had any problems.
Thanks
17 May, 2013
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I have 8 clematis and only one of them used to get black spots on the leaves in the spring, I found spraying for black spot did not stop it. Perhaps a shortage of magnesium? So every six weeks from spring to August I give it a handful of dry Epsom Salts, wait 48 hours and if no rain I water it in. It worked and the plant flourishes now, so its worth a try?
17 May, 2013