I have powdery mildew on a grape vine in a greenhouse. The green house is well ventilated and I am watering the vine when the top of the soil is dry . Can I use rose clear ultra to treat this or another product?
I'm afraid that RoseClear Ultra has not been tested for use on edibles, so it cannot be used.
We would advise contacting Bayer Garden UK to see if they have a suitable product that can be used on edibles.