Night blooming jasmine (Cestrum nocturnum), also commonly called night jessamine or queen of the night, is a shrub with a vining habit that produces fragrant flowers. The unripe berries of this plant are poisonous, so take precautions if you have small children or pets. Easy to grow, night blooming jasmine grows outdoors year-round in U.S. Department of Agriculture plant hardiness zones 8 through 11, although it may die back to the ground following frosts. This shrub can grow as a houseplant in cooler climates. When grown in containers, night blooming jasmine benefits from occasional repotting when the plant appears constantly water-stressed even with regular watering or when its roots begin to grow out of drain holes or on the soil's surface.
Water the night blooming jasmine well a few hours or a day before you repot it. This helps loosen the soil and minimizes trauma to the plant's root system.
Place a few inches of high-quality, well-draining potting soil in the bottom of a clean pot that is no more than 2 inches larger than the jasmine's current container. Use a pot with drainage holes. Add enough soil so that the plant's current soil surface will be about 1 inch below the lip of the new pot when the root mass is set in the container. If you are repotting the plant because the current soil or container has a problem, you can use the same size of container as that in which the plant is currently growing.
Lift the pot up, if possible, and turn it onto its side, using one hand to cradle the soil surface while you slide the container off the plant, using your other hand. You may need to tap the container's lip gently but solidly on the edge of a counter or table. If you cannot lift the container easily, carefully tip the container onto its side to remove the plant.
Cut any dead, brown, damaged or mushy roots off of the plant's root system using a sharp, clean knife. If the roots are growing in a tight circle around the edge of the root mass, use the knife to score the edges, making four evenly spaced vertical cuts about 1 inch deep around the circumference of the root mass and cutting an "X" into the bottom.
Set the night blooming jasmine's root mass, which should no consist of only healthy, firm, white roots, in the center of the prepared container. Add or remove potting soil under the roots, as needed, to adjust the depth of the root mass.
Fill in the space around the root mass with potting soil, gently firming it down as you go to remove air pockets. Water the soil slowly until water comes out of the drain holes. Add more soil, if needed, to make up for settling. Make sure the soil added around the root mass is level with the soil surface of the existing root mass.