Philodendron crassinervium

Origin of Philodendron crassinervium

Philodendron crassinervium is native to southeastern Brazil, extending south to Paraná. In the wild it grows on trees in warm tropical areas with a noticeable drier season.

Practical care for Philodendron crassinervium

• Stem support: Give the extending stem room to grow and add support if it starts to climb or lean. Avoid forcing the stem into a tight bend.
• Light: Keep it in bright indirect light. Protect the leaves from strong midday sun through glass.
• Water: Let part of the mix dry between waterings, then water thoroughly. Avoid leaving the pot dry for long periods or constantly wet.
• Potting mix: Choose a coarse aroid mix that drains readily and does not stay soggy.
• Temperature and humidity: Temperatures around 18–29 °C suit routine growth; relocate it if conditions stay below 15 °C. Keep humidity around 50–60%.
• Feeding: Use a diluted houseplant fertiliser while the plant is growing.
• Repotting: Repot when roots fill the container. If the pot stays wet for several days after watering, switch to a chunkier mix when you repot.
• Propagation: Propagate from a healthy stem section that includes a node; an existing aerial root can support early establishment.

Philodendron crassinervium problems and solutions

• The central vein looks unusually thick: This is normal for the species. Check more closely only if that part of the leaf becomes soft, discoloured or begins to collapse.
• Leaves lose firmness while the mix is dry: The plant is likely thirsty. Water thoroughly, let excess water drain and check the pot a little sooner next time.
• Lower leaves yellow while the pot stays wet: Water less often and make sure the mix drains freely. If yellowing continues, check the roots and remove only roots that are clearly rotten before repotting.
• Bleached or tan patches appear on the leaves: Strong direct sun or heat against glass can scorch them. Move the plant back from the intense light and keep new growth in bright indirect light.
• Brown or tan bumps stay fixed to stems or leaf stalks: Check closely for scale insects. Isolate the plant, remove visible insects and use a houseplant treatment suitable for scale, following the label.

Philodendron crassinervium 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.

Who first published Philodendron crassinervium, and what does the name mean?

Philodendron combines Greek philein, meaning “to love,” with dendron, meaning “tree.” The species name crassinervium combines Latin roots for thick and vein, matching the plant’s swollen midrib.

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

John Lindley first described Philodendron crassinervium in 1837 in Edwards’s Botanical Register, volume 23, plate 1958.