Grow ylang ylang in an area that receives a minimum of six hours of direct sunlight a day. If trees or shrubs are obstructing sunlight, consider pruning them to increase the amount of sunlight your ylang ylang receives.
Incorporate 4 or 5 inches of coarse sand or perlite to the top 10 to 12 inches of soil with a tiller or shovel when planting a ylang ylang. According to Pacific Island Agroforestry, ylang ylangs thrive in rich, sandy or volcanic soil conditions. If you're growing a potted ylang ylang, use a high-quality, well-draining potting soil.
Water a ylang ylang frequently to maintain moist soil conditions. It does tolerate short droughts but grows best in moist soil.
Add a 3- to 4-inch layer of mulch, such as compost or shredded bark to help conserve moisture. Mulch also adds nutrients to the soil, creating a rich, fertile soil bed where a ylang ylang will flourish. Replenish mulch as necessary every spring.