You might want to track temperatures during bud/bloom in re colors and patterns - and possibly even in substance. I think those might effect the presentation of the blooms and it could well vary from year to year. It's all to easy to see a trait and attribute to the wrong set of circumstances because of the timing. There are so many variables at any given time. The cause and effect may look apparent when it actually is not at all apparent. Growing a plant in a garden is very different than in a lab where conditions can be replicated exactly for observation. Always the possibility of some sneaky effect making what is observed fallacious. That's how old wives tales originate.
