My new greenhouse is supposed to be here this week – Fingers Crossed. Here is a photo of where I will assemble it, and a photo of the existing greenhouse all uncovered and ready for action. These small greenhouses work great for your Hoyas only if you have the necessary humidification controls. Without the controls, your greenhouse will quickly become a solar drying oven! Controls for heating, ventilation, and humidification do not come cheap. Be prepared to spend at least $500 even for a small greenhouse.