Houseplants Image Gallery
Houseplants Image Gallery

Houseplants Image Gallery Mother-in-law's tongue is a toxic house plant with green and white or yellow marbled leaves on thick green stems. See more pictures of houseplants.

Publications International, Ltd.

Mother­-in-­law's tongue is sometimes also called dumb cane -- both unflattering names that allude to this house plant's tongue numbing sap.

The dumb cane is so named because its toxic sap, if ingested, can cause a painful loss of speech. It forms a thick, green, canelike stem topped off by a cluster of large, fleshy, oval to lance-shaped leaves lightly to heavily marbled in white or yellow. The greenish flowers are of little interest.

When the dumb cane becomes too tall, air layer the top of the plant, then cut the stem into three-inch sections, and lay them sideways in a potting mix. They will soon produce new plants.

Mother-in-Law's Tongue Quick Facts

Scientific Name: Dieffenbachia sp.

Common Names: Dumb Cane, Mother-in-Law's Tongue

Light Requirement for Mother-in-Law's Tongue: Bright Light to Light Shade

Water Requirement for Mother-in-Law's Tongue: Drench, Let Dry

Humidity for Mother-in-Law's Tongue: Average Home

Temperature for Mother-in-Law's Tongue: House

Fertilizer for Mother-in-Law's Tongue: Balanced

Potting Mix for Mother-in-Law's Tongue: All-Purpose

Propagation of Mother-in-Law's Tongue: Air Layering, Stem Cuttings

Decorative Use for Mother-in-Law's Tongue: Floor, Table

Care Rating for Mother-in-Law's Tongue: Very Easy