Philodendron ‘Black Cardinal’ variegata

Origin of Philodendron ‘Black Cardinal’ variegata

The original non-variegated ‘Black Cardinal’ was selected in Cora McColley’s Florida breeding programme and patented in 1984. It is a cultivated variegated form of the self-heading hybrid Philodendron ‘Black Cardinal’.

Its selector, date of entry into cultivation and longer-term selection history are still uncertain.

How to care for Philodendron ‘Black Cardinal’ variegata

• Crown care: The compact plant stands upright on its own. Keep wet debris out of the centre and allow gentle airflow around the crown.
• Keep useful green growth: Retain healthy leaves and shoots with green tissue, especially if a new shoot is overwhelmingly pale.
• Use bright, filtered light: Introduce brighter conditions gradually, and protect the pale leaf areas from abrupt harsh sun or heat.
• Watering and potting mix: Use an airy mix that drains freely and retains a moderate amount of moisture. Water when part of the root ball has dried, let the pot drain and empty standing water.
• Temperature: Maintain a warm 18–29 °C range, moving the plant away from cold spots before temperatures remain below 15 °C. Keep the roots warm.
• Humidity: Provide roughly 50–60% relative humidity with light circulation through the foliage.
• Feeding: Feed only during active growth at a modest dose.
• Repotting: Repot when roots fill the container, moving up only slightly in pot size. Repot if the roots fill the container, drainage through the mix slows, or the plant loses stability.
• Propagation: Propagate from a rooted basal shoot, or from a healthy section of stem with a node.

Common Issues and Solutions

• The pattern changes from leaf to leaf: When the tissue is firm and healthy, a change in the amount or placement of colour is normal and needs no treatment.
• A pale section browns first: Check for a recent increase in sun or heat, roots that are too dry or remain wet, salt residue and physical rubbing. Correct only the factor that is present, then judge the result in later growth.
• An overwhelmingly pale shoot loses vigour: Keep the healthy growth that carries green tissue and do not add extra fertiliser. Prune only if the decline continues and a viable greener or patterned bud is available; the next growth pattern cannot be predicted.
• Leaves yellow or droop while the pot stays wet: Check moisture deeper in the root zone and inspect the roots for softness or an unpleasant odour. Remove only tissue that is confirmed dead, improve aeration and drainage, and allow part of the root ball to dry before watering again.
• Tight growth develops silvering, dark specks and repeated distortion: Check rolled leaves, petiole bases and both leaf surfaces to confirm thrips. Isolate the plant, rinse away insects you can reach, remove badly affected material when proportionate and recheck the protected growth. Sticky cards can monitor adults but will not control the infestation. If treatment is needed, use only an indoor product labelled for both the plant and thrips, following the label exactly.

Philodendron ‘Black Cardinal’ variegata is toxic to people and pets

• Keep this plant away from children, cats and dogs.
• Its leaves and stems contain insoluble calcium oxalate crystals, which can irritate the mouth, throat, skin and eyes.
• Chewing may cause burning pain, drooling, swelling, vomiting or difficulty swallowing. Contact a veterinarian or medical professional after exposure, especially if swelling or breathing problems occur.

What does Philodendron mean, and who first published it?

Philodendron combines Greek philein, meaning “to love,” with dendron, meaning “tree.”

Heinrich Wilhelm Schott established the genus Philodendron in 1829 in Wiener Zeitschrift für Kunst, Literatur, Theater und Mode, volume 3, page 780.