PLNTversePLNTverse
Plants › Aroids

dumbcane (Dieffenbachia seguine)

Dieffenbachia seguine is an evergreen perennial herb with an upright, sparsely branched habit; mature plants may become shrubby, with fleshy, jointed, cane-like stems.

LightSources differ somewhat on light conditions: bright filtered light to partial shade is described as most suitable, and it tolerates low light, although prolonged dim conditions may produce weak growth; stronger sunlight
WaterWater moderately during active growth, watering thoroughly after the surface of the growing medium dries and avoiding prolonged waterlogging; reduce watering in winter and keep it somewhat drier.
HumidityDieffenbachia seguine prefers high humidity.
TemperatureA single source reports a minimum temperature of about 4.4 °C, so sources are few for this figure. Sources differ in their hardiness descriptions. It is generally described as frost tender; keep above freezing.
Track your dumbcane in the PLNTverse app
dumbcane illustration

Overview

Dieffenbachia seguine is an evergreen perennial herb with an upright, sparsely branched habit; mature plants may become shrubby, with fleshy, jointed, cane-like stems.

Origin and habitat

Sources differ on its native range, describing it broadly as Neotropical, from southern Mexico, Belize, and Central America through the Caribbean islands to northern and tropical South America, including Colombia, Venezuela, Guyana, Suriname, French Guiana, Ecuador, Bolivia, and Brazil. It is reported from tropical American forest environments, with Dieffenbachia generally occurring in the filtered light of humid rainforest understories in the wild. Its climate is tropical, warm, and relatively humid.

Characteristics

Sources differ on mature height, placing it at about 100–400 cm, while mature spread is 50–91 cm. Growth is reported to be moderate; the large, simple leaves range from ovate to ovate-lanceolate, oblong, or lanceolate, are green to dark green and often glossy, and commonly show white, cream, yellow, or pale green mottling and markings. It forms the typical spadix and spathe inflorescence, which may be white to greenish white, and it rarely flowers indoors. A flowering period is reported, and fruiting is reported to be rare when grown as an indoor potted plant.

Light

Sources differ somewhat on light conditions: bright filtered light to partial shade is described as most suitable, and it tolerates low light, although prolonged dim conditions may produce weak growth; stronger sunlight may be acceptable in some outdoor conditions.

Watering

Water moderately during active growth, watering thoroughly after the surface of the growing medium dries and avoiding prolonged waterlogging; reduce watering in winter and keep it somewhat drier.

Humidity and airflow

Dieffenbachia seguine prefers high humidity.

Temperature and dormancy

A single source reports a minimum temperature of about 4.4 °C, so sources are few for this figure. Sources differ in their hardiness descriptions. It is generally described as frost tender; keep above freezing.

Growing medium and mounting

Use a well-drained, fertile, humus-rich growing medium; loamy or sandy soil can be used, and a broad range of soil acidity and alkalinity is tolerated. An airy mix is suitable.

Feeding

Sources differ on feeding schedules, but regular feeding during the growing season is recommended, with one source advising balanced liquid fertilizer and another advising slow-release fertilizer from spring through autumn.

Propagation

Propagation can be by stem-tip cuttings, bud-bearing stem-section cuttings, or air layering, while young Dieffenbachia plants can also be divided; stem sections can be laid horizontally on the surface of the growing medium and kept warm.

Common problems

Possible pests include scale insects, aphids, spider mites, whiteflies, and fungus gnats. Sources differ in their disease listings, which include leaf spot, root rot, blight, anthracnose, and stem rot. Prolonged insufficient light can cause weak growth; as plants age, lower old leaves may fall, and increasing foliage at the top can make plants top-heavy, causing stems to bend or plants to topple. It is sensitive to low temperatures, cold drafts, and frost, and cold injury can cause yellowing leaves, water-soaked patches, and wilting even when temperatures remain above freezing.

Identification

Upright fleshy stems and large variegated leaves, commonly marked with white, cream, yellow, or pale green patches, are key ornamental features.

Photos

Dieffenbachia seguine
📷 Forest & Kim Starr · CC BY 3.0 · source
Dieffenbachia seguine
📷 no rights reserved, uploaded by Jean-Paul Boerekamps · CC0 · source

Sources