I don't think they'd care--they never are on the ground like slugs are.

As those in the Soil, Compost, and Mulch forum told you there is a wide spread myth about used coffee grounds and what they will control. White Fly is not one of the few.

kimmq is kimmsr

Kathy, coffee grounds will have zero effect for whiteflies. As a matter of fact, they can cause problems for plants grown in confined spaces.

He needs to let us know the varieties of plants that are affected by these pests as well as more about the solarium.

Those yellow sticky traps are reputed to work.

But coffee grounds don't repel or control much of anything.