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Archidendron pauciflorum
Djenkol Tree
Archidendron pauciflorum
Archidendron pauciflorum, commonly known as Jengkol or Dogfruit, is a medium-sized tree belonging to the pea family (Fabaceae). Native to Southeast Asia, particularly Indonesia, Malaysia, Singapore, and Thailand, it is widely cultivated for its unique, edible seeds. The tree typically grows to about 15-25 meters tall, featuring a dense crown of attractive, bipinnate leaves. Its flowers are small and greenish-white, appearing in clusters. The most notable feature is its pods, which are large, dark purplish-brown, and twisted, containing several flat, kidney-shaped seeds. These seeds are a popular ingredient in various regional cuisines, despite their strong, distinctive odor, which can also be detected in breath and urine after consumption. Jengkol also has traditional medicinal uses and is valued for its timber in some areas. While its culinary use is widespread, it's important to note the potential for toxicity if consumed in large quantities or by susceptible individuals.
CategoryDetails
Plant TypePerennial plant
Medicinal UsageMedicinal Usage
Duration to maturity3 years to harvest
Estimated Plant Lifespan40 years lifespan
Toxic to humansToxic to humans
ToxicityToxic to: Dogs, Cats, Cattle, Goats
Sun Requirements4-6 hours direct sunlight (Partial Sun)
Pollination

Method: animal

Notes: Pollination is primarily carried out by insects, including bees and other small flying insects, attracted to the inconspicuous flowers. No specific manual pollination is typically required for good fruit set in a garden setting.

Watering Requirements

Method: top water

Frequency: When the top 2-3 inches of soil feel dry

Notes: Requires consistent moisture, especially during dry periods and while young. Ensure good drainage to prevent root rot. Established trees are more tolerant of brief dry spells but will benefit from regular watering during fruiting.

Humidity Requirements

Level: high

Maintenance: In naturally humid tropical climates, no special maintenance is needed. In drier environments, misting young plants or growing near water features can help. However, mature trees are generally resilient.

Care InstructionsPrune mature Jengkol trees to remove dead or diseased branches, improve air circulation, and manage tree size for easier harvesting. Young trees may need protection from strong winds. Fertilize regularly during the growing season with balanced organic fertilizers to support healthy growth and fruit production. Monitor for pests and diseases, addressing issues promptly with appropriate organic treatments.
Alternative NamesPithecellobium lobatum
Musa acuminata
Cavendish banana
Musa acuminata
Banana plants thrive in similar tropical, humid conditions and do not significantly compete for nutrients as their root systems occupy different depths. Their broad leaves can also provide some ground shade, helping to retain soil moisture around the Jengkol tree.
Curcuma longa
Turmeric
Curcuma longa
Turmeric is a herbaceous perennial that prefers partial shade, which it can receive from the mature Jengkol canopy. It has a relatively shallow root system, minimizing competition, and both plants benefit from rich, well-drained soil common in tropical environments.
Coffea canephora
Robusta Coffee
Coffea canephora
Coffee plants often benefit from shade in tropical climates, which a maturing Jengkol tree can provide. They share similar soil and humidity requirements, and the Jengkol, being a legume, can contribute to soil nitrogen, benefiting nearby coffee plants.
Hevea brasiliensis
rubber tree
Hevea brasiliensis

Rubber trees are fast-growing, large trees with extensive root systems that can aggressively compete for water and nutrients, especially in the upper soil layers, which Jengkol also requires for optimal growth.

Mangifera indica
Indian mango
Mangifera indica

Large, mature mango trees develop a dense canopy and extensive root systems that can heavily shade and outcompete young Jengkol trees for sunlight, water, and nutrients if planted too closely.

Pod Borers (e.g., Maruca vitrata)

These insect larvae bore into the developing pods and seeds, causing damage, premature ripening, and often making the seeds unsuitable for consumption. Symptoms include boreholes on the pods and frass inside.

Aphids

Small, soft-bodied insects that cluster on new shoots, young leaves, and flower buds, sucking sap. This can lead to distorted growth, yellowing leaves, and stunted development. They also excrete sticky honeydew, which can encourage sooty mold.

Mealybugs

White, cottony-looking insects that feed on plant sap, often found in leaf axils, on stems, or under leaves. Infestations lead to weakened growth, yellowing, leaf drop, and can cause sooty mold due to honeydew excretion.

Scale Insects

Tiny, immobile insects covered by a protective waxy shell, usually found on stems and undersides of leaves. They feed on sap, leading to yellowing, wilting, and reduced vigor. Severe infestations can cause branch dieback.

Steps:

    • Select fresh, mature seeds from healthy, ripe pods.
    • Soak seeds in warm water for 24 hours to aid germination.
    • Plant seeds about 2-3 cm deep in a well-draining, rich potting mix or directly into prepared soil.
    • Keep the soil consistently moist but not waterlogged.
    • Germination typically occurs within 1-3 weeks. Provide partial shade for young seedlings and gradually introduce to more sun.
    • Select a healthy, disease-free scion (cutting) from a mature, productive Jengkol tree.
    • Choose a rootstock of a compatible Jengkol seedling, typically 6-12 months old.
    • Perform a preferred grafting method (e.g., cleft graft, splice graft).
    • Ensure cambium layers align and secure the graft union tightly with grafting tape.
    • Place the grafted plant in a humid environment and provide indirect light until the graft heals and new growth emerges.

Neem Oil

An effective organic insecticide and fungicide to deter aphids, mealybugs, scale insects, and fungal issues. It disrupts insect feeding and growth cycles.

Compost Tea

Provides a natural boost of nutrients and beneficial microbes to the soil, enhancing plant health and vigor, which improves resistance to pests and diseases.

Beneficial Nematodes

These microscopic worms are natural predators of various soil-dwelling insect larvae, including some borers, providing a biological control method.

Fish Emulsion

An organic liquid fertilizer rich in nitrogen, phosphorus, and potassium, providing balanced nutrition for healthy growth and fruit production.