Have you had some cold nights? They can go a bit white if put out when not completely hardened off, or if it's a bit too cold for them. Busy lizzies are very cold sensitive.

if they are in full sun they will also scorch. I find these are better in semi shade.

I can testify to that Seaburngirl. I have two lots at the moment, some in shade and some in full sun. Those in some shade are doing far better.