Brown spotting on A. victoria regina
Curious as to what causes this. Doesn't seem to happen over the summer ... just while wintering indoors. (Or perhaps I'm just more unobservant while it summers outside.)
It winters on an unobstructed SE windowsill. While it is cooler by the window, the plant is not at all in contact with the glass rather about 3-4 inches (7.5-10cm) from the window. Water is greatly restricted over the winter as it is for most of my cacti/succs and I do not allow the leaves to get wet during those infrequent winter waterings as I'm trying to avoid having bacterial or fungal issues.