A succulent is any plant with thick, fleshy water storage organs. Succulents store water in their leaves, stems or roots. They prefer bright light as found on a south facing window. They are cold tolerant, thrive in colder nights and ideally prefer temperatures of 70-85 degrees Fahrenheit. They should be watered generously in the summer. During the winter when the plants go dormant, cut watering back to once a month.
Crassulas belong to the group of plants known as succulents. They come from South Africa and grow in sunny dry areas and can survive long dry periods. The most important thing to remember is NOT to give a little bit of water every few days. When the soil is wet the roots can rot. Let the soil dry out properly before you water it again. And then make sure the soil gets soaked and let the plant drain. After such a watering the plant can do without water for weeks!