I noticed these really odd spherical dark colored dots on the back of the leaves. They are slightly raised, and not part of the leaf. I think they may be some kind of egg.
Any help with ID &/ treatment would be appreciated!
CLOSED: Weird dark dots on back of hibiscus leaves
These look like fungal spores (see http://imcoutdoorliving.com/wp-content/uploads/2016/12/artFun.jpg for an image) to me - do you by any chance use wood chip or similar mulch in or around your flower beds?