dublin bay rose.stems covered with white substance

Hi Dawn.

I would recommend spraying your roses with either Liquid copper and also a spraying oil such as Enspray 99. This will cover all your bases and help eradicate any fungal diseases and also any insects. Winter is a great time to spray for fungal diseases.

Alternatively, you could use Yates Super shield Rose Spray. This will also cover insects and disease.

All the best.