Medinilla

Medinilla is a genus of epiphytic evergreen shrubs or small trees native to tropical and subtropical areas of Central Africa, Southern Asia, Northeast Australia, and the Western Pacific. This genus has 368 accepted species and is a member of the Melastomataceae family. The genus, Medinilla, is named in honor of the governor of the Mariana Island, José de Medinilla y Pineda in 1820. In their native tropical habitats, some of the species grow up to 10 feet tall. When grown as a container planting, they are much smaller and may grow 2 to 4 feet tall and 1 to 3 feet wide. The leaves may be opposite, whorled, or alternate depending on the species. This genus is known for its beautiful flowers that may be white, pink, red, orange and may appear singularly or in panicles.

This genus of plants prefers partial shade or bright, indirect sunlight. They are tolerant of the morning sun, but the hot afternoon sun should be avoided. The soil recommended should be moist, well-drained, and a peat-based potting mix with a slightly acidic pH. They prefer high humidity of 60% or higher and warm temperatures between 65 to 75 degrees Fahrenheit. Use a balanced, liquid fertilizer once a month during the growing season. These plants can be propagated by seeds, stem cuttings,  or softwood cuttings.  

The plants may be small trees or erect or climbing shrubs. The stems can be succulent or corky and are 4-sided. The leaves may be large, ovate to oblong, leathery, and green. Some species the leaves measure 8 to 12 inches long. The flowers are small and may appear in drooping panicles up to 18 to 20 inches long. Some species have large, showy bracts. The fruit is a non-edible berry that may appear globular, ovate, or urn-shaped. 

In our location, these ornamental plants are best suited for container plantings for a greenhouse, conservatory, or used as a houseplant. They thrive in high humidity and warm temperatures and are intolerant of temperatures below 50 degrees Fahrenheit. In warm tropical climates, they can be used as border plants. 

Insects, Diseases, and Other Plant Problems:  As a houseplant, monitor for spider mites, mealybugs, and scale. Root rot can occur from overwatering or poor drainage. Provide good air circulation to prevent powdery mildew. Sudden temperature changes can cause leaf drop. The leaf tips can brown if the humidity is too low. 

Many plants in this genus are reportedly weedy and invasive in Hawaii. The seeds can be dispersed birds and water. These plants have escaped cultivation, formed thickets, smothered, and displaced some native plants..