Two years back whe had -20 celcius -4 F , but i have several heaters to keep the temp around 50 F, the greenhouse is 92x33 and 14 feet high. So a fine temp to work with the plants and take some cuttings
At this time of the year the cymbidiums are starting to bloom ,have about 60 different specie,s of them , Isle flamingo is one of my favorite,s