white dots on leaves of perennials

Asked June 8, 2014, 5:22 PM EDT

Many of my perennials (hostas, coral bells, holly hocks, ligualaria, penstemon and snap dragon) suddenly have several leaves covered with white dots that do not rub off. What should I do?

Arapahoe County Colorado

1 Response

Hmmmmm, white dots? Can you send a picture. There are so many ways white dots could be intrepeted -- hail damage, powdery mildew, holes in the leaves, scarring on the top of the leaf but not on the bottom, etc.

There has been quite a bit of hail in many areas and that would caused damage to lots of plants. If that is the case, you might fertilize lightly, remove any unsightly leaves and wait a couple of weeks for new growth.

Send a picture if you think there is something other than hail that could be causing it. Also, how long has this been a problem, when did you notice it, etc.