Pruning a Giant Monstera or Philodendron Selloum?

Pruning a Giant Monstera or Philodendron Selloum?

A reader has a 40-year-old “Monstera” (named Arthur) in a 3-foot diameter pot. A central stem 4 feet tall produces leaves that no longer mature—possibly too far to pump water and nutrients. Questions: Can the stem be cut? How much? Can roots be trimmed and repotted in the same pot?

First: Identify the Plant

Monstera deliciosa has long vining stems with leaves along them. Philodendron selloum has a single thick, upright stem with foliage only at the top. The description matches Selloum.

Why New Leaves Are Small

Selloums grown in greenhouses have huge leaves. Indoors, lower light causes the plant to produce smaller leaves over several years. This is adaptation, not decline.

If New Leaves Are Distorted/Dying

That signals a root/watering issue—usually soil not drying properly between waterings. Water only when top quarter of soil is dry.

Pruning & Root Trimming

• Selloums can be cut back to at least 8 inches above soil, but this won’t fix light or water problems.
• Root pruning is inappropriate until the underlying cause is resolved.

For guides on pruning, repotting, and Philodendron care, email wcreed@HorticulturalHelp.com.