Mature size & growth rate

How big does Tree philodendron (Thaumatophyllum bipinnatifidum) get?

Also called lacy tree philodendron, split-leaf philodendron (large), horsehead philodendron.

About Tree philodendron

Thaumatophyllum bipinnatifidum · also called lacy tree philodendron, split-leaf philodendron (large) · tropical

Tree philodendron (formerly Philodendron selloum) is a large clumping aroid from South America with deeply lobed glossy leaves. It develops a thick trunk over time. Mildly toxic to pets due to insoluble calcium oxalates and best suited to larger rooms.

Thaumatophyllum bipinnatifidum (long sold as Philodendron selloum / bipinnatifidum), native to subtropical rainforests of southern Brazil, Bolivia, Argentina and Paraguay.

Unlike vining philodendrons it is self-heading — a large, non-climbing shrub whose deeply cut leaves rise on long stalks from a central crown atop a stout woody stem; it needs floor space, not a moss pole. Calcium oxalate toxic to pets.

Mature size: 1.5-2.5 m tall and wide indoors

Sources: missouribotanicalgarden.org, plants.ces.ncsu.edu, aspca.org

Indoor size vs how big it gets in the wild

Tree philodendron grows on a tree's timeline and scale — indoors it becomes a tall, trunked statement plant rather than a tabletop one. Indoors and in a pot, expect 1.5-2.5 m tall and wide indoors. A pot, your light levels and a little pruning are what set the final size in a home, far more than the plant's theoretical potential.

It gains real height on a trunk or main stem, adding a tier of leaves a year and eventually reaching for the ceiling — this is a plant you grow up, not out.

Growth rate and years to mature

Tree philodendron is a fast grower. Realistically, expect two to four years from a young plant to a room-filling specimen in good light. Its feeding profile backs this up: balanced liquid feed at half strength monthly in growing season.

Want this turned into the right next pot at the right moment? The pot size calculator and the tree philodendron repotting guide cover when and how much to size up — pot size is one of the biggest levers on how fast tree philodendron grows.

How to keep tree philodendron smaller

You are not stuck with the maximum size. For tree philodendron specifically, these are the levers, in order of impact:

The decisive tool is the secateurs: tree philodendron can be topped (cut the main growing tip) to cap its height and force a bushier, shorter shape.
Keeping it deliberately pot-bound in a snug container slows the whole plant and limits ultimate size.
Prune in spring so it heals fast; remove the tallest leader back to a node to reset the height.
Expect to top or hard-prune it every year or two — left alone it heads for the ceiling.

The keep-it-smaller method, step by step

Pick the new height. Decide how tall you want tree philodendron and find a leaf node or branch point just below that.
Top the main stem. Cut the main growing tip cleanly just above that node in spring; this permanently caps the height and forces side branches.
Keep the pot snug. Avoid jumping to a much bigger pot — a slightly restricted rootball keeps the whole plant smaller.
Maintain the shape. Prune back the tallest new leaders each spring to hold it at the height you chose.

How to grow tree philodendron bigger or faster

If you want it to fill the space sooner, push the conditions rather than hoping — for tree philodendron the accelerators are:

It already wants the bright light it needs; warmth, a yearly pot-up and spring-summer feed are the accelerators.
Pot up a size every year or two while young; restricted roots are the main thing holding height back.
Feed regularly through the growing season and keep it warm — height comes from sustained good conditions.

Light is almost always the ceiling. The tree philodendron light requirements page covers exactly how bright a spot it needs to grow at its potential instead of stalling.

When tree philodendron outgrows the room (or the pot)

"Too big" usually arrives as one of these signs for tree philodendron:

The top leaves pressing against or bent by the ceiling — the classic "this is now too tall indoors" sign.
It has to be moved away from a light source it has literally outgrown.
Roots filling the largest pot you can reasonably keep indoors — at that point it is top-or-prune or move it outside (if hardy).

If it is the pot rather than the room, it is a repotting job, not a goodbye — see the tree philodendron repotting guide. If you want more of this plant instead of a bigger one, the tree philodendron propagation guide turns prunings into new plants.

Tree philodendron size — frequently asked questions

How big does tree philodendron get?

Tree philodendron reaches 1.5-2.5 m tall and wide indoors when grown indoors. It gains real height on a trunk or main stem, adding a tier of leaves a year and eventually reaching for the ceiling — this is a plant you grow up, not out.

Is tree philodendron slow or fast growing?

Tree philodendron is a fast grower. Expect two to four years from a young plant to a room-filling specimen in good light. Tree philodendron grows on a tree's timeline and scale — indoors it becomes a tall, trunked statement plant rather than a tabletop one.

How long does tree philodendron take to reach full size?

Roughly two to four years from a young plant to a room-filling specimen in good light. Light, pot size and feeding move that timeline more than anything else.

How do I keep tree philodendron smaller?

The decisive tool is the secateurs: tree philodendron can be topped (cut the main growing tip) to cap its height and force a bushier, shorter shape. Keeping it deliberately pot-bound in a snug container slows the whole plant and limits ultimate size. Prune in spring so it heals fast; remove the tallest leader back to a node to reset the height. Expect to top or hard-prune it every year or two — left alone it heads for the ceiling.

How can I make tree philodendron grow bigger or faster?

It already wants the bright light it needs; warmth, a yearly pot-up and spring-summer feed are the accelerators. Pot up a size every year or two while young; restricted roots are the main thing holding height back. Feed regularly through the growing season and keep it warm — height comes from sustained good conditions.