small white specks on bird's nest fern
I have three ferns - (1) rabbit's foot and (2) bird's nest ferns that I treasure. They are growing fine but have very small white specks on them. It is not mealy bugs nor white flies. Have treated with Safety Soap but to no avail. They summer outside and in a greenhouse during the winter but am afraid to put them in the greenhouse now because of these specks. They are still healthy looking and growing! Any ideas? Many thanks.