Those are in line with the answers I've gotten over the years. I choose the Pheno and it's reaction to temps just like the flowers. It is often noted in ads for a particular strain known for its colors that results will vary based on temps. But that is just my pick of the options possible. I think it will take a real research project with lab work to solve this one. To find the trigger.
Don't tell me it is in the shadow of the Ark you're building. It hasn't rained that much, It's just over watered. The clawfoot is the tell.