Rust on Roses
Dorothy, Dundas, Ontario, Canada (Zone 6)
Doug says:
Rose rust is a royal pain in the anatomy and luckily we don't see it all that frequently here in the North-east. It is mostly a problem out west or in similar climates
Yes, early morning and frequent watering is going to be a problem for many plants. It isn't the early mornings that create a problem but rather the urge to water frequently now that you have the system.
Rose rust is controlled (but not eliminated) by using an organic spray containing sulphur.
Sanitation is critical - removing infected leaves and ensuring that no plant debris is allowed to overwinter.
If you want to ask a question about rust on roses, click here

