Clerodendrum Japonicum

Description

Clerodendrum Japonicum, commonly known as Harlequin Glorybower, is a deciduous shrub native to China and Japan. It belongs to the family Lamiaceae and can grow up to 10 feet tall. The plant has a unique appearance with its distinct foliage and flowers. It is a great addition to any garden, providing an attractive display of color and fragrance.

Taxonomic Information

Appearance

The Clerodendrum Japonicum has large, heart-shaped leaves with a deep green color. The foliage is glossy and can grow up to 8 inches in length. The plant also produces clusters of small, white flowers that are tinged with pink. The flowers have a sweet, pleasant fragrance that attracts butterflies and other pollinators. The plant blooms in late summer and early fall, adding a burst of color to the garden.

Care Guide

Clerodendrum Japonicum requires regular care to ensure its health and growth. Here are some tips for caring for your Harlequin Glorybower:

Water: Water the plant regularly, making sure the soil is moist but not waterlogged. During hot, dry weather, increase watering to keep the soil from drying out.

Fertilization: Fertilize the plant in the spring with a balanced, slow-release fertilizer. Avoid over-fertilizing, as this can damage the plant.

Soil: The plant prefers well-draining soil that is rich in organic matter. It can tolerate a range of soil types, but it does best in slightly acidic soil.

Sunlight: Harlequin Glorybower prefers full sun to partial shade. It can tolerate some shade, but it will not bloom as well in low light conditions.

Hardiness Zones: The plant can grow in USDA hardiness zones 7 to 9.

Common Pests & Diseases

Clerodendrum Japonicum is susceptible to a few common pests and diseases. Here are some of the most common issues to watch out for:

Aphids: These small insects can damage the plant by sucking the sap from the leaves. They can be controlled with insecticidal soap or neem oil.

Spider Mites: These tiny pests can cause yellowing and wilting of the leaves. They can be controlled with insecticidal soap or neem oil.

Powdery Mildew: This fungal disease can cause a white, powdery coating on the leaves. It can be controlled with fungicides or by improving air circulation around the plant.

Habitat

Clerodendrum Japonicum is native to China and Japan but has been cultivated in many other parts of the world. It prefers well-draining soil and can grow in a range of habitats, including forests, meadows, and gardens. The plant is often used as an ornamental shrub in landscaping due to its attractive foliage and flowers.

Question and Answer

Q: Is Clerodendrum Japonicum toxic to pets?

A: Yes, the plant is toxic to cats and dogs and can cause vomiting, diarrhea, and other symptoms if ingested.

Q: How often should I prune my Harlequin Glorybower?

A: Prune the plant in the spring to remove any dead or damaged branches. You can also prune it to control its size or shape.

Q: Can I propagate Clerodendrum Japonicum from cuttings?

A: Yes, the plant can be propagated from softwood cuttings taken in the spring or summer.

Q: How tall can Clerodendrum Japonicum grow?

A: The plant can grow up to 10 feet tall in ideal conditions.

Related Plants

Here are some other plants in the Clerodendrum genus:

• Clerodendrum bungei
• Clerodendrum trichotomum
• Clerodendrum thomsoniae
• Clerodendrum ugandense

References

• “Clerodendrum Japonicum.” Missouri Botanical Garden, www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?kempercode=d387.
• “Clerodendrum Japonicum.” Plant Care Today, 24 May 2021, plantcaretoday.com/clerodendrum-japonicum.html.
• “Harlequin Glorybower.” North Carolina State Extension, content.ces.ncsu.edu/harlequin-glorybower.