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AMORPHOPHALLUS titanum

Image of Amorphophallus titanum

Gerald L. Klingaman

Family

Araceae

Botanical Name

AMORPHOPHALLUS titanum

Plant Common Name

Titan Arum

General Description

This gigantic, summer-growing plant from Sumatra has perhaps the largest inflorescence and tuber in the plant kingdom. In late spring, if the female plant is old enough, a thick, tall flower stalk emerges and unfurls a multicolored spathe and spadix with a rotting, foetid stench. It is pollinated by flies and carrion beetles. In summer, an immense leaf stalk reaches skyward with a huge, umbrella-like leaf that is very lobed and attractive.

This singular plant needs a warm, alkaline, well drained soil that is moist in the growing season but markedly drier in winter. It is a celebrated specimen plant of conservatories and plant collectors.

Characteristics

  • AHS Heat Zone

    12 - 10

  • USDA Hardiness Zone

    11 - 15

  • Plant Type

    Bulb or Corm or Tuber

  • Sun Exposure

    Partial Shade

  • Height

    10'-15' / 3.0m - 4.6m

  • Width

    12'-18' / 3.7m - 5.5m

  • Bloom Time

    Late Spring, Early Summer

  • Native To

    Southeastern Asia

Growing Conditions

  • Soil pH

    Neutral, Alkaline

  • Soil Drainage

    Well Drained

  • Soil type

    Loam

  • Growth Rate

    Medium

  • Water Requirements

    Average Water

  • Habit

    Upright/Erect

  • Seasonal Interest

    Spring, Summer, Fall

Ornamental Features

  • Flower Interest

    Showy

  • Flower Color

    Green, Burgundy, Dark Red, Ivory

  • Flower Color Modifier

    Multi-Color

  • Foliage Color (Summer)

    Green

  • Foliage Color (Fall)

    Green

  • Fragrant Flowers

    Yes

  • Fragrant Fruit

    No

  • Fragrant Foliage

    No

  • Bark or Stem Fragrant

    No

  • Repeat Bloomer

    No

  • Showy Fruit

    No

  • Edible Fruit

    No

  • Showy Foliage

    Yes

  • Foliage Texture

    Bold

  • Foliage Sheen

    Matte

  • Evergreen

    No

  • Showy Bark

    No

Special Characteristics

  • Usage

    Container, Feature Plant, Tropical

  • Sharp or Has Thorns

    No

  • Invasive

    No

  • Self-Sowing

    No