What is a Philodendron Selloum?
Philodendron Selloum — botanically reclassified as Thaumatophyllum bipinnatifidum in 2018 — is a large, self-heading tropical aroid native to the rainforest floors of South America. Unlike climbing philodendrons, it grows from a central rosette, with each enormous, deeply lobed leaf radiating outward on a long petiole. Indoors it can easily reach five feet tall and span a similar width, making it one of the most architecturally striking houseplants available. It is also called the lacy tree philodendron or split-leaf philodendron (though that common name is shared with the unrelated Monstera deliciosa).
How much light does a Philodendron Selloum need?
Bright, indirect light gives you the full effect — leaves that are large, deeply lobed, and a rich, glossy green. In a lower-light spot the plant survives, but new leaves emerge smaller with shallower cuts, and growth slows noticeably. A position several feet from a large south- or east-facing window is ideal; avoid direct afternoon sun, which scorches the broad leaf surfaces that have no tolerance for intense direct rays. If you notice consistently small or un-lobed new growth, light is the first variable to improve.
How often should you water a Philodendron Selloum?
Water roughly every 1–2 weeks, but let the soil guide you rather than the calendar — check that the top 1–2 inches of soil are dry before you water again. The plant’s large leaves transpire a lot, so it drinks more in bright, warm, active-growth conditions and far less in lower light or winter dormancy. Overwatering (consistently wet soil) is the main killer: it leads to root rot that can topple even a large, established plant. A chunky, well-draining potting mix and a pot with a drainage hole are non-negotiable.
Why are my Philodendron Selloum’s leaves turning yellow?
Yellowing leaves are almost always a watering issue. The most common cause is overwatering — roots sitting in soggy soil cannot uptake oxygen, and lower leaves yellow and drop. Underwatering can also cause yellow if the plant is truly bone dry for extended periods. A single occasional yellow leaf at the base is normal as the plant cycles through older growth; a pattern of multiple yellowing leaves at once signals a problem. Adjust watering and make sure the pot drains freely.
How do you care for the dramatic lobed leaves?
The lobed leaves are the whole point — keep them in good shape by dusting them monthly with a damp cloth. Dust accumulates quickly on the large surface area and blocks light, which reduces photosynthesis. The plant also appreciates average humidity (40–60 %) and benefits from occasional misting or a nearby humidifier in dry indoor environments. Brown leaf edges usually signal either very dry air or erratic watering. Wipe the leaves from petiole to tip, supporting each leaf with your other hand so you do not stress the stem.
Is Philodendron Selloum toxic to pets?
Yes — the ASPCA lists it as toxic to cats and dogs. All parts of the plant contain insoluble calcium oxalates. If chewed, these crystals embed in soft tissue and cause intense oral burning, excessive drooling, vomiting, and difficulty swallowing. Keep the plant on a plant stand or in a room the pet cannot access — the large, dangling leaves can be tempting to curious animals.