Posted: 19/06/2012 at 11:06
Geoff's right - there's not an enormous amount that you can do about it. One thing I find that helps is to feed the plants very heavily - that encourages them to grow faster, and they can outgrow the rust for a time. You can also try spraying regularly with a fungicide, but will need to add a drop of soap to it to get it to stick to the leaves. Other than that - grow something tall in front of them to hide the bald stems.