Possibly Botrytis cinera, a gray mold. I'd start with Daconil. See: https://canr.msu.edu/news/botrytis_blight_update/ Mark Mazer Hertford, NC On Sun, Jan 30, 2022 at 4:53 PM R Hansen via pbs < pbs@lists.pacificbulbsociety.net> wrote: > Nils has a problem with botrytis on Cyclamen coum, and the first thing I'd > do is repot into a fast-draining mix, then water from the bottom and maybe > add about 1/4 dose of liquid fertilizer. The combination of damp soil, lack > of air circulation, inside habitat, etc. are all probably contributing > factors. I have a couple coum inside in a garden window facing west right > now. They're only here while they flower and will go out again shortly. Few > cyclamen like to be inside, especially the species. I have rolfsianum in > this same garden window, and it's clear they are not getting enough light. > > I've not ever had botrytis on indoor cyclamen and always change potting > soil > the minute I buy one, florist's hybrid or not. Hope this helps. Coum do > like > more moisture so keep an eye on them; you can check the watering status by > lifting the pot up. The lighter it is, the drier it is. As soon as you can, > put the coum outside for more light and air circulation, even if it's only > out during the day. Protect from freezing however in its weakened state. > > Robin Hansen > Southwestern Oregon > Cold, sunny shifting to rain, at last. > > _______________________________________________ > pbs mailing list > pbs@lists.pacificbulbsociety.net > http://lists.pacificbulbsociety.net/cgi-bin/… > Unsubscribe: <mailto:pbs-unsubscribe@lists.pacificbulbsociety.net> > _______________________________________________ pbs mailing list pbs@lists.pacificbulbsociety.net http://lists.pacificbulbsociety.net/cgi-bin/… Unsubscribe: <mailto:pbs-unsubscribe@lists.pacificbulbsociety.net>