Pruning and Propagating an Overgrown Dieffenbachia (Dumb Cane)

Managing a Tall, Leggy Dieffenbachia

Melanie inherited a large dieffenbachia that's leaning and reaching the ceiling. She wants to know if it can be trimmed and if cuttings can be rooted.

Identification and Safety

The plant is a Dieffenbachia (dumb cane). Its sap contains calcium oxalate crystals that cause temporary numbness and swelling if ingested—keep away from pets and toddlers.

Pruning Strategy

• Cut the main stem back to 1–2 feet. New growth will emerge just below the cut.
• Don't worry about leaving a bare stub; it will leaf out quickly.
• Pruning does not harm the plant—only changes its shape.

Propagating the Top Cutting

Root the removed top section by burying 6 inches of stem in the same pot's soil. This creates a second stem for a fuller plant. No repotting needed—the current pot is fine. Stakes can be discarded after pruning.