|photo from gardenbuddies.com Rose Madame Caroline Testout recommended by Dermot for Irish Gardens|
"Keep black spot away and save a small fortune
Mix 3 level teaspoons of bicarbonate of soda with 1 teaspoon of soluble fertiliser and a tiny dash of washing-up liquid. Mix together with a little water and add to 1 gallon of water. Using a watering can, apply once a fortnight and your roses are guaranteed to be black spot free."