Tabernaemontana coronaria is commonly known as crepe jasmine, although it isn't closely related to true jasmine. Coronaria is a flowering shrub that can grow up to ten feet tall but is typically grown as an ornamental plant. It's native to India and Thailand, and requires a tropical climate. Coronaria is only hardy in USDA zone 11, meaning that it doesn't tolerate temperatures below 50 degrees Fahrenheit.
Dig a hole deep enough to keep the plant at the same depth as it was in the container. If you are planting in rich soil the hole should be twice as wide as the root ball. If the soil is poor, make the hole larger.
Add compost if the soil is poor. This will increase the water retention for sandy soil and improve the drainage for clay soil. Create a mixture that contains half original soil and half compost.
Remove the young coronaria from its container and carefully separate the roots. Look for a line near the base of the tree where the bark changes color, indicating where the soil line was. Place it the hole so that its best side is in front and ensure that the soil is at the same level as it was in the container.
Fill the hole with the original soil, or a mixture of soil and compost if you need to enrich the soil. Pack the soil down just enough to support the coronaria shrub. Add a layer of mulch and water the tree thoroughly.
Fertilize the coronaria when you plant it and at least once during the first year while it's growing. The young plant will need a fertilizer with phosphorus to develop a good root system. You can determine the phosphorus content from the second of three numbers on the fertilizer label.