Pardon the title, but the fact that I’m focusing a bit this season on petal color changes due to light exposure (which I’m calling “photochromism”, but is probably not, because that definition implies reversibility) got me to wondering if there are any cultivars which are more susceptible to anthocyanin color shift based on soil pH. I have followed discussions which imply that, for example, reds may be “enhanced” with acidic soils, and yellows with alkaline, but I’m looking for more dramatic visual contrasts with pH. Anybody ever observe this?