Can black spot disease be passed from a rose to a jasmine plant and kill it?
Black Spot Disease
Certified GKH Gardening Expert
It could transfer from one plant to the other. Roses tend to be more susceptible, but a jasmine could get fungus from the rose. If you suspect your roses have it and you want to make very sure that the jasmine does not get it, start treating the jasmine with a fungicide. We are personally fond of neem oil for this. This article will tell you more about it: https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm