Cacti and succulents have unique water storage capabilities, and their watering needs differ from other houseplants. As a general rule, it's best to allow the soil to dry out completely between waterings. This typically means watering every 1-2 weeks during the growing season (spring and summer) and reducing frequency during the dormant period (fall and winter). However, it's important to adjust watering based on the specific needs of your plant, the potting mix, and the environmental conditions. Always check the soil moisture level before watering to avoid overwatering, which can lead to root rot.