The new year has arrived and with it our first frost of the fall/winter season. We have had torrential downpours, occasional flurries of snow or sleet, but no extended periods of cold weather. My alpines are not happy. I find myself constantly battling botrytis.
I recently found a new 3-in-1 spray for fungus, molds, mildew, and bugs. One of the principle ingredients is sulphur. I have been using sulphur powder for several years to deal with the occasional outbreak of botrytis and the allionii tolerate it quite well. I have been using this new spray on the surface of my plunge beds, around the pot rims and on the surface of the soil after I remove all the infected leaves. I avoid spraying directly on the leaves. I started doing this last month and so far it seems to be working. What would work better would be a nice long period of cold, dry weather!