Protecting cabbages

QuestionsProtecting cabbages
Paul Cassidy Staff asked 15 years ago

I was told that a great way to protect cabbages was to place rhubarb leaves in water and bring to the boil. Once boiled, allow for the water to cool down and then add a small amount of washing up liquid. You then spray your cabbages with the water and the washing up liquid allows it to stick to the leaves thus offering protection. Is this correct please ?