This succulent should only need to be watered approximately once per week. Before watering your succulent, let it dry out for at least one week. Allow the plants to soak in the water at least for an hour. Watering should be done on a weekly basis. Euphorbia Ingens can stay longer in warm conditions, where temperatures are between 74 and 80 degrees Fahrenheit. You can avoid over-watering your plant by keeping it at room temperature. Water your succulents less frequently, and when you do, use large volumes of water. 3. Teabags – Succulents can have their cup of tea!