Even when not in bloom, Hoya callistophylla is a plant worth growing for its beautiful leaves.
Scientific Name
Hoya callistophylla T.Green
Scientific Classification
Family: Apocynaceae
Subfamily: Asclepiadoideae
Tribe: Marsdenieae
Genus: Hoya
Etymology
The specific epithet "callistophylla (kal-lis-toh-FIL-uh) means "the most beautiful leaf" and refers to the beautiful veins of leaves.
Origin
Hoya callistophylla is native to Malaysia. It grows as an epiphyte in the forests of Nabawan District in Sabah, a state in northern Borneo.
Description
Hoya callistophylla is a beautiful plant with slender stems that bear large, very hard, attractively patterned leaves. The stems can grow up to 16.4 feet (5 m) long. The leaves are lime green with dark green to almost black venation. They are thick, elliptical, and lance-shaped, with irregular, rough margins, and can measure up to 10 inches (25 cm) in length and 4 inches (10 cm) in width.
During the spring and summer, Hoya callistophylla produces pretty, fragrant flowers with a yellow to red-purple corolla and a white corona. The flowers appear in hemispherical clusters, each with 20 to 40 flowers. Unfortunately, they only last for up to two days. The podlike fruits can grow up to 4.8 inches (12 cm) long.
How to Grow and Care for Hoya callistophylla
Light: Although this plant can tolerate lower light levels, it may become weak and leggy if the light is too low, producing fewer leaves and flowers. Therefore, keeping it indoors in bright, indirect sunlight is best.
Soil: Well-draining soil that provides excellent aeration and does not hold too much water is most important for growing a healthy plant.
Temperature: Hoya callistophylla thrives in hot and humid climates, so it should be kept away from drafty windows and doorways during the colder months. It grows best in USDA Plant Hardiness Zones 11a to 11b, with average minimum winter temperatures ranging from 40 to 50 °F (4.4 to 10 °C).
Watering: As this plant is sensitive to overwatering, soak the soil thoroughly during the spring and summer, but allow it to dry out before watering again. Otherwise, you will increase the risk of root rot, and your plant will not be happy. It is relatively dormant during the fall and winter and needs only moderate watering.
Fertilizing: While Hoya callistophylla is not a particularly heavy feeder, it can benefit from half-strength high-potassium fertilizer every two weeks during the growing season.
Repotting: As an epiphyte, this plant has shallow root systems and does not require a deep container or frequent repotting. It prefers to be slightly rootbound, so repot it in spring only if it outgrows its container.
Propagation: Although layering is the easiest method, using stem cuttings is the most popular method of propagating Hoya callistophylla. Using leaf cuttings can be more challenging, while starting it from seeds is the simplest but the most time-consuming method. For best results, take cuttings only when the plant is actively growing and sow the seeds in spring and summer.
Learn more at How to Grow and Care for Hoya.
Toxicity of Hoya callistophylla
Hoya callistophylla is considered non-toxic, so having it around kids and pets is safe.
Links
- Back to genus Hoya
- Succupedia: Browse succulents by Scientific Name, Common Name, Genus, Family, USDA Hardiness Zone, Origin, or cacti by Genus
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