Thank you, thank you all! Will report back about results.
I think the mold issue is related to the fact we live in a heavily wooded area. When we lived on our farm (house was in the open, in the middle of the property) it was never an issue.
My cushion covers are all non removable. The cushions for the table chairs are small enough to wash at the laundromat, but my wicker cushions are not washable. And I do love the pattern/colors; from P1 last year. They are lime green and TQ, but in a pastel, muted pattern. Very pretty, love them!