Hi Junebug,
Just a short note in response to your message about this possibly being George King...even though it may be a clone of 'Serendipity', doesn't mean that the colors will match exactly. Sometimes different growing conditions will alter the way genes are expressed even if the genetic material of the plants are identicle. Color is one of these traits that can be slightly or even moderately different using different temperatures, fertilizers and watering regimes. So, just because your plant may be more pink than salmon or vice versa, doesn't necessarily mean it isn't a George King 'Serendipity'.
Good Luck with the grower you mentioned.