Everyone's having trouble this year, but I would ask whether you planted these in the same place as previous years, or in the same soil in the same containers as previous years? Verticillium wilts can be a problem with repeat plantings.

We have grown the busy lizzies in yhe same containers but have changed the soil.
Thank you for your response

Many people have complained about the busy lizzies this year. I bought some plugs on mail order and potted them on but they didn't make it to the garden. I've been told there is a virus attacking them.