We had an interesting call in our shop this week. A local florist had been having problems with two certain types of plants dying. They had been replaced four times, with the same results. She talked to her distributor who had an idea. Could this be from a refrigerant leak? The florist wasn't having any problems with the temperature in her walk in and the plants had been dying for weeks. If there was a leak, it would have to be very small. Would that tiny amount of refrigerant really kill a plant? Well, a technician was sent out to leak check. Lo and behold the suction header access port was leaking R-22. Apparently china doll plants and umbrella plants are susceptible to refrigerant leaks. None of our technicians had ever heard of such a claim and I've spent more time than I care to admit trying to find a reference to this. I still don’t know why it happens but maybe I’ll give our customers plants as Christmas gifts this year!