Very Young Tiny My Young Rosemary Plants Have Tiny White Things Living Underneath The Leaves That Seem To Be Slowly Killing..?

My young rosemary plants have tiny white things living underneath the leaves that seem to be slowly killing..? - very young tiny

them? Things, it is a type of white also, just maybe a website, although I think it spinning. I grew these plants and it took me so long can I stay? except that the plants are doing well about 10 inches tall and have a good taste. ... Thank you, I am new to this ...