Greenovia is an infrequent flowering plant and there is evidence that it is monocarpic. This means it will flower once, eventually, and then die after it sets seed. If your plant flowers and doesn’t have pups, this is bad news. You may certainly collect and plant the seed, but as with most succulents, you will have to wait years for any identifiable form. Caring for greenovia is very similar to the maintenance for other succulents. They are sun-loving plants. But if the temperature is too high, they will get sunburn too.
Geenovia has aestivation every year. It was based on the temperature. When the temperature go over 95 °F, their leaves will curl, to prevent excessive water loss which looks like a rose. That's what we call "aestivation". Also Geenovia only has color when it starts to sleep. Their true growth season is winter to spring, when temperatures are cool, 65 to 75 °F (18 to 24 °C), and damp.
During the dormancy, Geenovia doesn't need too much water. Some people will say it doesn't need water at all during the summer. I would say Greenovia is a plant too. It needs water no matter how. In the summer, because of the high temp, water evaporates faster then other season. If a plant has no water at all, it will die. In the moist area, you can spray some water in the surface evening or morning. It will help to cooling and hydrating. If you are in the dry area, you can water once or twice a month. Please don't pour the water in the heart of the plants. Because during the aestivation, Geenovia will close like rose. Some of them look like a cup. If you pour the water in the middle, they will store the water in the middle for a while. That will definitely kill the plants.
In any other cooler season, Geenovia will start to open and grow. Now they need water and fertilizer. Thoroughly drench your Rose Succulent as soon as the soil becomes totally dry. Test by poking your finger down into the soil an inch or 2 (2.5 to 5 cm). Too much moisture or allowing them to sit in wet soil will cause root rot.
Most of the succulents will not survive under 35 °F, including the Greenovia