WATER: Jasmine plants loses leaves and leaves dry up from both too much and too little water. In the spring and summer, keep the soil moist but never soggy. The top 30% of the soil should dry out before watering. Soil that stays too wet, too long, damages the roots of the plant and eventually prevents the roots from absorbing water at all. When you do water, water well enough so that the water comes out the drip holes in the bottom of the pot. Do not allow the plant to sit in this excess water. During the fall and winter, keep a jasmine plant on the drier side.