My goodness, the color of these flowers are just fantastic. Makes me want to grow M. theresae again. I've grown it twice but had problems with spider mites both times. Also had mite problems with M. saboae. However, the flowers of your plant are really spectacular. Really a lovely color. Thanks as always for sharing with us.
It was a great display. Unfortunately it seems to need bright sun for the flowers to open and although it did this on a show day there was no point of taking it inside for a show. I think this group of Mammillarias are susceptible to mites.