"Mary Fisher"wrote
I've just come back from being with Spouse for a hospital out-patient
appointment. we were a bit early so I picked up an RHS Garden magazine in
the waiting room (RHS = Royal Horticultural Society).

There was a picture of a pinkish water lily which was captioned as being
the first true blue water lily. Hah! I wish I'd had more details so that I
could have sent your picture in but we were called at that point :-(

I think that was said to be the first Frost Hardy blue water lily.

--
Regards
Bob Hobden