Alocasia reginula ‘Ninja Variegata’

Where Alocasia reginula ‘Ninja Variegata’ comes from

The variegated ‘Ninja’ form is assigned to Alocasia reginula. This compact species is thought to be Bornean, but its exact location in the wild has not been established.

Care for Alocasia reginula ‘Ninja Variegata’

• Light: Place it in bright, filtered light and introduce any direct sun gradually.
• Watering: Wait until the upper part of the mix begins to dry, then water again before the potting mix dries all the way through. Water until excess runs from the drainage holes. Let the pot drain, then empty any water left in the saucer or cover pot.
• Potting mix: Use a light, nutrient-rich mix that holds some moisture while still draining well.
• Temperature: Keep it around 18–29 °C and away from cold windows or draughts. Move it away from cooler spots before temperatures fall below 15 °C.
• Humidity: Alocasia does best with medium to high humidity. Keep it in a bright spot away from heaters and air-conditioning. If the air is dry, place it near other houseplants that like similar conditions, leaving space between the leaves, or use a clean humidifier.

Solving problems on Alocasia reginula ‘Ninja Variegata’

• Pale variegated sections turn brown or crisp before the greener parts of the leaf. These areas are more easily damaged by strong direct light or repeated drying. Move the plant away from harsh sun and return to more even watering without keeping the mix continuously wet. See our variegated houseplant guide for more detail.
• An emerging leaf sticks, creases or tears as it opens. Check the new growth carefully for mites or thrips. If you find pests, isolate the plant and use a treatment labelled for the identified pest on indoor ornamental plants, following the label for repeat timing. If there is no sign of pests, do not pull the leaf open; keep watering and room conditions stable and let it open on its own.
• Leaf tips and edges become dry and crisp. Check whether the root ball has been repeatedly drying too far or whether the plant is sitting in very dry air. Restore more even moisture, move it away from heaters or strong, dry air and make sure excess water can still drain away easily.
• The base turns soft or the plant begins to collapse from below. Remove it from the pot and check the roots and base of the plant for decay. Cut away any soft or rotten parts with a clean, disinfected blade, disinfecting it again between cuts. Discard the removed rotten material. Repot only the firm, healthy part of the plant in fresh, freely draining mix. Use our root rot guide if rot has spread beyond a few roots.

If you're not sure what is causing the problem, or the plant keeps getting worse after you have corrected the likely cause, send us clear photos of the plant and the affected areas so we can help.

Alocasia reginula ‘Ninja Variegata’: toxic if chewed

• Pets: This Alocasia is toxic to cats and dogs. Keep the plant and any cut pieces where pets cannot chew them.
• Children and handling: Keep it out of reach of children. Sap from damaged tissue can irritate skin and eyes, so wash your hands after pruning and avoid touching your face.
• Why it irritates: Alocasia tissue contains insoluble calcium oxalate crystals. Chewing or contact with sensitive tissue can cause immediate local irritation.
• Possible symptoms: Mouth exposure can cause burning pain, drooling, swelling, nausea or vomiting, and difficulty swallowing.
• After exposure: For a pet, contact a veterinarian. For a person, remove any plant material from the mouth and rinse with water; seek medical or poison-control advice if symptoms are significant. Breathing difficulty or rapidly increasing swelling needs urgent medical attention.

The names reginula and ‘Ninja’ in the variegated form

Reginula is the diminutive of Latin regina, “queen”, so the epithet means “little queen”. Alistair Hay described Alocasia reginula in 1998 in Gardens’ Bulletin Singapore, volume 50, page 258.

The horticultural name ‘Black Ninja’ appeared around 2020, with ‘Black Velvet Ninja’ and ‘Ninja’ also used for this line.