Identifying and being familiar with your succulent will help you decide the right amount of fertilizer it may need. Exposed to the heat sun, this attractive indoor succulent can get sunburnt. The Saguaro desert cactus is an indigenous plant from Mexico. It can live up two centuries and is slow-growing. The Saguaro cactus is a tropical jungle plant that thrives in the sun. However, the plant stays below the foliage and the temperature is generally relatively low. For healthy growth, these sun-lovers prefer bright light. Get them a west or south-facing window.