Clerodendrum paniculatum aka Pagoda Flower

Clerodendrum paniculatum is an erect, fast-growing semiwoody shrub. Most sources put the typical mature height at 1-1.5 meters with a 0.6-0.9 meter spread, though TopTropicals reports it can reach 3 meters in favorable tropical conditions. It is often multi-stemmed and spreads via suckers, eventually forming colonies if not contained. Large evergreen leaves up to 30 cm wide make it a substantial presence even when not in bloom.

The Pagoda Flower is native to a broad area of tropical Asia and Papuasia, including southern China and Taiwan, Indochina (Myanmar, Thailand, Cambodia, Laos, Vietnam), southern India, Bangladesh, Sri Lanka, the Andaman and Nicobar Islands, Borneo, Sulawesi, Sumatra, the Philippines, the Bismarck Archipelago, Fiji, and French Polynesia. It has been introduced and is naturalized in parts of Central America and the Pacific. It grows from waste ground to rainforests, often near fresh water.

Clerodendrum paniculatum is hardy in USDA zones 8-11. It can withstand brief drops to around 30 °F (-1 °C) but is fundamentally a tropical-to-subtropical plant that performs best in consistently warm conditions. In cooler climates it is grown as a tender perennial or container plant that must be protected from frost.

The Pagoda Flower's namesake feature is its enormous tiered inflorescence: a thyrsoid cyme up to 40 cm long and 38 cm wide that rises above the foliage in a stacked pyramid resembling a Japanese pagoda. Individual flowers are small, funnel-shaped with long tubes, about half an inch long, and most often bright orange-red or scarlet, though crimson, yellow-orange, and rare white forms exist. Flowering occurs year-round in frost-free climates and from summer through autumn in cooler subtropics.

Grow Clerodendrum paniculatum outdoors in USDA zones 8-11 in a sunny to lightly shaded position with rich, moisture-retentive but well-drained soil. Provide regular watering throughout the growing season. In tropical and frost-free subtropical climates it flowers nearly year-round; elsewhere it can be grown as a summer container or conservatory plant brought in for winter. Site it where its colony-forming sucker growth can be managed.

Clerodendrum paniculatum is easily propagated by several methods: seed, softwood cuttings, half-ripe wood cuttings, root cuttings, and division of the suckers it readily produces from the base.

The flowers are highly attractive to butterflies and hummingbirds, which are the principal pollinators in regions where they occur. Like other members of the genus Clerodendrum, this species uses both dichogamy (timing-based separation of male and female flower phases) and herkogamy (spatial separation of stamens and stigma) to discourage self-pollination and promote outcrossing.

No edible uses are documented for Clerodendrum paniculatum. It is grown ornamentally and used medicinally rather than as food.

Clerodendrum paniculatum has a long history of use in traditional medicine across Southeast Asia. Leaf infusions are used as a purgative, and crushed leaves are applied as poultices for burns, wounds, and ulcers. Root preparations are used for pulmonary problems, edema, haematuria, and rheumatism, and the plant has documented antimalarial and anti-tuberculosis properties. In Thailand it is also used for anti-inflammatory purposes. These uses are traditional and not a substitute for medical treatment.

Beyond its ornamental value in tropical gardens and its traditional medicinal applications, no notable other uses (such as fiber, dye, timber, or fodder) are documented for this species.

The genus Clerodendrum, including this species, hosts the larvae of certain butterflies and moths such as Endoclita species. No major pest or disease problems are documented in the consulted sources.

Caring for Pagoda Flower is a breeze, as it is highly adaptable and forgiving to minor neglect.

Pagoda Flower should be watered regularly, allowing the soil to dry out between waterings.

Pagoda Flower loves a well-draining soil. Perlite and vermiculite help with drainage, while coco coir adds organic matter, so a good potting soil mix will have all three. You can improve store-bought soil by adding some perlite to it.

Pagoda Flower requires abundant, bright, and direct light to thrive. The best placement for this plant is within one foot of a window to ensure it receives enough light. If you live in an area with more extreme weather, such as hot summers or cold winters, you may need to adjust the placement of the plant accordingly. During hot summer months, it is important to place the plant away from full sun, as this can cause the leaves to yellow or burn. During cold winter months, it is best to move the plant closer to the window to take advantage of the extra light that can help it survive. By keeping an eye on the current weather in your area, you can make sure your Cleodendrum is always in the right place to thrive.

Ploi lacks confirmed information on the toxicity of this plant. If you, a relative, or your pet accidentally consume plant material with unknown toxicity, it's best to consult a medical expert.