Can you bring it indoors, or a garage for those nights? They do need cool nights to initiate blooms, but I don't think they would deal with frost. Most of my orchids can stay outside if under cover of trees, shrubs, awnings. We rarely see frost on the ground..a bit on the rooftops and icy windshields is our occasional cold. Some of the older Cyms. are more tolerant than others, but mine are older.
