Clerodendrum calamitosum

Clerodendrum calamitosum is a perennial evergreen shrub belonging to the Lamiaceae family. Originally classified within the Verbenaceae family, this species is noted for its delicate, white, tubular flowers and its historical significance in traditional Southeast Asian medicine, where it is often referred to as a remedy for various ailments.

Native to the Malay Archipelago, including Indonesia and the Philippines, this plant thrives in tropical environments characterized by high humidity and consistent warmth. In agricultural and horticultural contexts, it is grown in regions that replicate its natural habitat or in climate-controlled environments such as greenhouses and botanical gardens.

Botanically, the plant is distinguished by its opposite, dentate leaves and terminal flower clusters that exhibit long, protruding stamens. The shrub can reach heights of up to two meters in favorable conditions. Its growth habit is typically bushy, making it a suitable candidate for managed landscape designs in frost-free climates.

Cultivation requirements include a nutrient-rich, well-draining soil mix and high air humidity. The plant is sensitive to low temperatures and should be protected from drafts and frost. Regular pruning is a critical agrotechnical practice that encourages lateral growth, enhances the overall shape of the plant, and stimulates more prolific blooming throughout the season.

The primary economic use of this plant is found in herbal medicine, particularly as a diuretic and anti-inflammatory agent. Agronomically, the crop is susceptible to common greenhouse pests such as spider mites and mealybugs. Managing these threats involves maintaining adequate air circulation and monitoring the plant for early signs of infestation.

• Light requirements: Bright, filtered light.
• Watering: Consistent moisture, reduced during dormant months.
• Soil type: Fertile, loamy, well-draining substrate.
• Temperature tolerance: Thrives in 20-25°C ranges.