Thank you. In the same bed I have a late flowering clematis, the leaves of which have gone a pale green, look mildewey, but are not actually mildew and almost no flowers this year. I also have hollyhocks near the rose and clematis. The hollyhocks seem to be infected with multiple brown spots under the leaves and I am wondering if hollyhocks are susceptable to any virus's or fungus which can be transferred to other plants. I had my suspicions last year that the holyhocks were the culprits.
Roses and clematis both need a fair amount of food and water. Have you fed them? When well fed and watered they are less susceptable to disease. A lot of plants, such as Michaelmas daisies, Monarda and Phlox look mouldy when allowed to dry out. You think they are mouldy because of damp but it's the other way round. The summer has been dry this year.
Dordogne and Norfolk. Clay in Dordogne, sandy in Norfolk.
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You may have to resort to something like "Fungus Clear". It doesn't have a pesticide in it anyway.
Thank you. In the same bed I have a late flowering clematis, the leaves of which have gone a pale green, look mildewey, but are not actually mildew and almost no flowers this year. I also have hollyhocks near the rose and clematis. The hollyhocks seem to be infected with multiple brown spots under the leaves and I am wondering if hollyhocks are susceptable to any virus's or fungus which can be transferred to other plants. I had my suspicions last year that the holyhocks were the culprits.
Hollyhocks get a disease called "Hollyhock rust". Here is what the RHS says about it http://apps.rhs.org.uk/advicesearch/Profile.aspx?pid=564
Roses and clematis both need a fair amount of food and water. Have you fed them? When well fed and watered they are less susceptable to disease. A lot of plants, such as Michaelmas daisies, Monarda and Phlox look mouldy when allowed to dry out. You think they are mouldy because of damp but it's the other way round. The summer has been dry this year.