The Q&A Archives: clematis

Question: Why does my Clematis start to come back every year but then wilt & die?

Answer: Sounds suspiciously like a disease called clematis wilt. The cause of clematis wilt is really unknown but the most common theory is that it is caused by a fungus. Presumably this is a very selective fungus that can attack shoots, leaving the root system healthy. Another theory is that snails or slugs attack the stem of the plant causing a portion of the plant to be cut off from its water. Other possible causes are genetic weakness due to hybridization or damage caused burrowing animals such as moles, chipmunks, or voles(mice) that disturb or feed on the root system causing the plant to prune itself accordingly. Others have observed that clematis, even large flowered hybrids, that are planted in a spot where there is a subsoil water source such a spring, a stream or at a river bank, wilt is almost non-existent. The wilt is truly a mystery. University studies, supported by the British Clematis Society and others, into the exact cause(s) of clematis wilt are presently under way in England. The good news is that wilt is rarely fatal to the plant. It might take up to a year, but the plant will usually sprout a vigorous shoot from under the ground to live another day. Cut away any wilted shoots and hope that a healthy new one will emerge. I think it will recover. Best wishes with your clematis!

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