Two for the price of one, please?
(Deal, Dover, England)
My first question concerns two Crassulas in my collection, cotyledon and perfoliata, which are both suffering from what looks like black mould. They have been in my greenhouse (pictured) with the doors open day and night during the summer, but could this be caused by lack of air flow? I've moved them outside now in the hope that this might help?
Second is the propagated young plant. The leaf which I propagated is now obviously dead but the roots on the new plant just won't root. I've had this on damp compost for about five weeks now but they don't seem to want to root themselves. Is there anything I can do to encourage them, please?