Rust on Roses
Question:
How can I prevent my rose bushes getting rust, also do I need to put a pot ash in soil, they are just starting to get the leaves, then during the summer they get what I think is rust and they fall off.
Answer:
Rose rust fungi can survive over the winter on fallen leaves or on the soil surface. They can also become attached to objects such as stakes, fences and rose stems.
Spray your plants and surrounding area with a fungicide now before the overwintering spores germinate, make sure you spray both sides of the leaves and the stems. Try one of the following: Scotts Fungus Clear, Systhane Fungus Fighter or Roseclear 3 (the last two also contains an insecticide if this is needed), you should be able to get them at your local garden centre. These sprays also help control powdery mildew and blackspot.
If you prefer not to use chemicals pick up and burn or otherwise dispose of fallen and infected leaves. Prune the plants to keep them as open as possible and allow air to circulate. Cut out and destroy any rust lesions on the stems, as well as old and weakened wood.
For best results use a combination of natural and chemical solutions.
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