Anthurium regale aka Regal Anthurium

Anthurium regale is a challenging species best suited to experienced growers. It requires high humidity (70–85%), consistently moist soil, and stable temperatures, making it significantly more demanding than common houseplants like pothos or philodendrons. It is also a slow grower and quite sensitive to environmental fluctuations—particularly drying out, which can be fatal. That said, it rewards attentive care with some of the most spectacular foliage in the plant kingdom.

Anthurium regale prefers temperatures between 15–28°C (60–82°F), with an ideal range of 20–26°C (68–80°F). Avoid exposing it to temperatures below 15°C (60°F), as cold can damage the foliage. Interestingly, this species also dislikes excessive heat and benefits from slightly cooler conditions compared to many tropical houseplants—some growers maintain it in an air-conditioned area of their greenhouse.

Anthurium regale is one of the largest Anthurium species. The plant reaches 1.5–2.4 meters (5–8 feet) in height, and individual leaves can approach 2 meters (6 feet) long in the wild, though cultivated specimens typically produce leaves of 60–90 cm. It is a slow grower, producing roughly one new leaf every three months under optimal conditions. The plant grows from a short, stout central stem with long petioles radiating outward.

The most reliable methods are stem division and stem cuttings. For division, carefully separate the plant when it has produced multiple growth points, ensuring each section has healthy roots—dust cuts with fungicide since anthuriums are susceptible to fungal infections. For stem cuttings, cut between nodes and place on damp sphagnum moss until new growth appears in a few weeks. Propagation is best done in spring or summer. Seed propagation is possible but extremely slow and rarely used.

Anthurium regale produces a typical aroid inflorescence consisting of a green spathe and spadix. The spadix bears tiny perfect flowers containing both male and female organs. Unusually, pollen is produced from the top of the spadix downward (the reverse of most anthuriums), and it takes nearly two months for pollen production to begin. The flowers are not particularly showy—this species is grown for its spectacular velvety foliage rather than its blooms.

In nature, Anthurium regale is pollinated by insects, primarily beetles. The spadix produces pollen in an unusual top-to-bottom sequence, and the male and female flower phases are separated in time to promote cross-pollination. In cultivation, hand pollination can be performed using a fine paintbrush to transfer pollen between two plants when they are in the appropriate flowering stages. Successful pollination produces small berries containing seeds on the spadix.

While no named cultivars of the pure species are widely recognized, Anthurium regale is a popular parent in hybrid crosses. Notable hybrids include A. regale × A. magnificum (called "Petir" in Indonesia, meaning "lightning"), A. regale × A. crystallinum, and A. (magnificum × papillilaminum) × regale. The closely related A. magnificum and A. crystallinum share the velvety silver-veined appearance but differ in leaf shape, petiole cross-section, and native range—the easiest distinguishing feature of A. regale is its more intricate venation extending closer to the leaf border.

Anthurium regale can only grow outdoors year-round in USDA zones 11–12, where temperatures consistently stay above 10°C (50°F). In all other climates, it must be grown indoors or in a heated greenhouse. Even in suitable warm climates, it needs a shaded, humid location protected from direct sun and wind. It is not frost-tolerant under any circumstances and will suffer damage from prolonged exposure to temperatures below 15°C (60°F).

Pruning needs are minimal—simply remove yellowed, damaged, or dead leaves by cutting at the base of the petiole with sterilized scissors or shears. Allowing spent foliage to remain can cause the stem to bend, which may lead to stunted growth. Since the plant produces leaves slowly (roughly one every three months), avoid removing healthy leaves. Periodically trimming old growth helps the plant direct energy toward new leaf production.

Repot Anthurium regale every two to three years or when roots begin circling the pot. Use a container one size larger with adequate drainage holes, and fill with a chunky, well-draining aroid mix (bark, perlite, peat, and charcoal). Spring is the best time to repot. Handle the roots gently, as this species is sensitive to root disturbance, and dust any damaged roots with fungicide to prevent infection.

Gently wipe the large velvety leaves with a soft, damp cloth to remove dust that blocks light absorption. Avoid using commercial leaf shine products, as they can clog the stomata on the velutinous (velvety) leaf surface and damage the delicate texture. Regular cleaning also helps spot early signs of pests like spider mites or mealybugs, which hide on leaf undersides.

The most common cause is overwatering leading to root rot, which prevents nutrient uptake. Other causes include too much direct sunlight, nutrient deficiency, or bacterial wilt (Ralstonia). Check the roots first—if they are black and mushy, trim the affected roots, repot in fresh well-draining mix, and reduce watering frequency. If roots are healthy, evaluate light levels and consider fertilizing with a balanced fertilizer.

Brown leaf tips and edges most commonly indicate low humidity—Anthurium regale needs 70–85% humidity and browning is one of the first signs of insufficient moisture in the air. The ExoticRainforest specialist notes that allowing the plant to dry out caused 'the edges of the largest leaf to all begin to brown.' Other causes include over-fertilization (salt burn), direct sunlight (scorching), or underwatering. Increase humidity with a humidifier and ensure the plant is protected from direct sun.

Drooping leaves usually signal either underwatering or root rot. If the soil is dry, water thoroughly and the plant should recover within hours. If the soil is wet and the plant is still drooping, root rot is likely—remove the plant from its pot, trim any black or mushy roots, dust with fungicide, and repot in fresh well-draining mix. Low humidity, temperature stress from cold drafts, and recent repotting shock can also cause temporary wilting.

Some older leaf loss is natural as the plant matures, but excessive leaf drop indicates stress. Common causes include inconsistent watering, low humidity, cold drafts, or root rot. Anthurium regale is particularly sensitive to drying out—even a single drought episode can cause leaf damage and drop. Ensure stable conditions with consistent moisture and humidity, and check roots if multiple leaves are affected simultaneously.

Anthurium regale is inherently a slow grower, typically producing only one new leaf every three months even under ideal conditions, so slow growth is partly normal for this species. If growth seems especially stalled, check that humidity is above 70%, light is moderate to bright indirect, and temperature is 20–28°C. Insufficient light is the most common cause of even slower growth. Feed monthly with a balanced liquid fertilizer during the growing season.

The most common pests are spider mites, mealybugs, aphids, thrips, and scale. Spider mites thrive in dry conditions, so maintaining high humidity is a natural deterrent. Treat infestations with neem oil or insecticidal soap. Key diseases include root rot (from overwatering), bacterial blight caused by Xanthomonas (V-shaped water-soaked leaf lesions), and black nose disease (progressive blackening of the spadix). The University of Florida also documents Phytophthora and Pythium as threats. Good airflow and proper watering are the best preventive measures.

Regal Anthurium’s native range is the Americas.

Regal Anthurium should be watered regularly, allowing the soil to dry out between waterings.

Regal Anthurium 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.

To ensure optimal growth, the Regal Anthurium prefers bright diffused light for 6-8 hours each day. Insufficient light can result in slow growth and leaf drop, so it's important to find a well-lit location for this plant. Place it near a window, within a distance of 1 meter (3 feet), to enhance its potential for thriving.

The Regal Anthurium does not necessitate supplementary humidity. Plants primarily absorb water through their roots, rather than their leaves. Hence, the most effective way to supply humidity to your plants is by watering the soil.

The Regal Anthurium should be transferred to a new pot once it has increased in size two-fold, or on an annual basis, whichever occurs earlier. Replacing the soil with fresh potting soil containing all the necessary nutrients, is sufficient enough to support the growth of the plant, thus avoiding the need to use fertilizer. It's important to note that plants derive their energy from the sun and not fertilizer.

Ploi does not possess verified information regarding the toxicity of this particular plant. In the event that you, a member of your family, or a pet ingests plant material with an unclear toxicity level, it is highly recommended to seek the advice of a medical professional.

During the wintertime, it's common for Regal Anthurium to go dormant and their growth may slow down, so waterings should be spaced out more.