What ratio do I use to mix Dawn dishwashing liquid and water to spray rosebushes?
Hardiness Zone: 8a
By B Mattke from Fort Worth, TX
What is the reason you want to use Dawn? Is it to control aphids? Or other bugs? I think you use about a tsp.
Dish detergent in dilutions about the same as for dish washing serves as a good insecticidal soap. If you want to control blackspot, a broad spectrum anti fungal such as Daconil is best.