I have a large climbing rose on the front of my house, for last 12 years it has looked wonderful with thick blooms and I have not done much to it beside water and prune. This year the blooms are sparse and a lot of leaves have fallen off, they appear to be very sticky. What should I do, maybe a spray of some kind but I am unsure what to use?
Certified GKH Gardening Expert
You could try Neem oil. The stickiness could be from an attack by aphids, mealy bugs, soft scale or other insects that feed on plant leaves. They leave behind honeydew, a sticky secretion that attracts ants.