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Amorphophallus konjac
Konjac
Amorphophallus konjac
Amorphophallus konjac, also known as konjac, konnyaku potato, or devil's tongue, is a plant species native to East Asia. It is known for its large, distinctive corm (underground stem) and its unusual inflorescence, a spadix enclosed by a modified leaf called a spathe, which can be purplish-brown. The spathe emits a strong odor, attracting pollinators. The plant produces a large, deeply lobed leaf, and the corm is rich in glucomannan, a soluble fiber with various uses.
CategoryDetails
Plant TypePerennial plant
Culinary UsageEdible plant
Medicinal UsageMedicinal Usage
Duration to maturity2 years to harvest
Estimated Plant Lifespan10 years lifespan
Sun Requirements2-4 hours direct sunlight (Partial Shade)
Pollination

Method: Insect pollination

Notes: Attracts pollinators with its strong odor.

Watering Requirements

Method: Top watering

Frequency: Keep soil moist but not waterlogged.

Notes: Reduce watering frequency during dormancy.

Humidity Requirements

Level: Moderate

Cleaning RequirementsProtect leaves from strong winds and harsh sunlight.
Temperature Range

Min: 10°C

Max: 30°C

Alternative NamesUmbrella Arum, Amorphophallus rivieri, Amorphophallus rivierei

Cultivars

Price: $39
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Price: $36
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Colocasia esculenta
Taro
Colocasia esculenta
Both are shade-tolerant plants that thrive in similar conditions, such as moist, well-drained soil. They are often grown together in traditional gardens.
Zea mays
Maize
Zea mays

Corn is a vigorous grower with extensive root systems that can outcompete Amorphophallus konjac for water and nutrients, especially in smaller garden spaces. Their nutrient requirements overlap significantly.

Aphids

Aphids are small, sap-sucking insects that feed on the plant's sap, causing stunted growth and leaf deformation. They excrete honeydew which can lead to sooty mold.

Slugs and Snails

These mollusks can feed on the leaves and corms, causing damage to the plant structure. They prefer moist conditions.

Steps:

    • Carefully remove the mature corm from the ground.
    • Identify small cormels attached to the main corm or separate daughter corms.
    • Plant the cormels or divided corms in well-drained soil with adequate spacing.
    • Provide appropriate light, moisture, and temperature conditions.

Neem oil

Effective against aphids and other soft-bodied insects.

Diatomaceous earth

Can be used as a natural slug and snail repellent.