Dropped flower buds are often caused by soil that is too dry or too wet. Also, do not move the plant when buds are forming because changes in light may cause them to drop. Raising the humidity can help. Repot in early spring every 2-3 years or when it outgrows its pot. Wax Plant blooms best when almost pot -bound, so move it to a slightly larger pot (about 2 inches (5 cm) larger than the old one). Never repot a plant when it's in bloom because it may drop its flower buds.