Root Depth: star jasmine has a moderate root depth, typically reaching around 10 to 12 inches deep. Watering should be done thoroughly to ensure the water reaches the bottom of the pot. The optimal watering quantity depends on factors such as pot size, root depth, and plant size. As a general guideline, for a mature star jasmine plant in a 10-inch pot, watering with approximately 1.5 to 2 liters of water per session is recommended. Smaller pots or younger plants may require less water.