Try to create a suitable root environment by deep cultivation and mulching, to minimise root stress. clematidina is an occasional problem for the nursery trade and specialist growers, but relatively uncommon in gardens. In such circumstances they suffer from severe stress which contributes to poor growth and what is loosely described as wilt. However, in gardens, clematis are often planted in shallow dry soils in exposed sites, often close to buildings. Both hybrid and species clematis can also be affected by root diseases such as Phytophthora root rot and honey fungus, and because the root system is unable to function properly wilting will result.Ĭlematis is a plant which, in the natural environment, prefers a deep and fertile soil in a moist and shaded habitat. slugs and snails) or simply physical damage (such as twisting of stems in strong winds). On any clematis, wilting of shoots is often the result of problems such as grazing of the stems by invertebrates (e.g. clematidina, unless it affects one of the more susceptible large-flowered hybrids it is most likely to be caused by something else. So, although wilting in clematis plants is often blamed on C. These other problems are equally common on the large-flowered hybrids clematidina, and is probably caused by cultural problems, other diseases, or feeding damage from invertebrates. Wilting in resistant hybrids and species clematis is very unlikely to be C. Wilting in large-flowered hybrid cultivars may be caused by Calophoma clematidina, in which case it should be possible to find some of the symptoms described below. Research has clarified two important points: Wilting has long been recognised as a serious problem in clematis. Although it is known that Calophoma clematidina causes clematis wilt, there are many cases of wilting symptoms in clematis recorded where the fungus is not present. Several of the large-flowered hybrid cultivars are very susceptible, but the smaller flowered species appear to be much more resistant. Malvern Autumn Show - 22–24 September 2023Ĭlematis wilt is a disease of clematis caused by the fungus Calophoma clematidina (syn Phoma clematidina, Ascochyta clematidina). RHS Garden Wisley Flower Show - 5–10 September 2023. RHS Garden Rosemoor Flower Show - 18–20 August 2023. 
RHS Garden Hyde Hall Flower Show - 2–6 August 2023.RHS Flower Show Tatton Park - 19–23 July 2023.
RHS Hampton Court Palace Garden Festival - 4–9 July 2023.
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