Q.Can Dormant Oil/ Lime Sulfur Be Used On Perennials Other Than Roses And Trees In Early Spring?
Last year I had some plants with powdery mildew and am hoping to get ahead of it this year. I dormant oil/ Lyme sulfur my roses in spring. I trimmed back the dead foliage to the ground on the affected perennials ( ie. salvia, speedwell, asters). Can I spray them too.
Certified GKH Gardening Expert
That should be fine. Here is more: