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Is a fungal disease which forms on the undersides of infected leaves and spreads rapidly in cool, humid conditions on plants with wet leaves.
Shows as angular markings, usually yellow, brown or purple on the upper surface of the leaf, flowed by distorted growth and premature leaf fall. On the undersides of the leaf a downy or felt-like growth, ranging in colour from white or grey to purple, the plant gradually declines in vigour.
Now you know what the problem is, and the damage it is doing, don't let your plant suffer.
For specific problems try one of our specialists...
RHS Harlow Carr
Harrogate, United Kingdom
Gardens of Versailles
Versailles, France
Powerscourt Gardens
Enniskerry, Co. Wicklow, Ireland
Monet's Garden, Giverny
Giverny, France
Saint Petersburg Botanical Garden
Saint Petersburg, Russia
Koishikawa Korakuen Gardens
Tokyo, Japan
