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Plant care

Monkey Jack (Lakoocha) care

Artocarpus lakoocha

Also called Monkey Jack, Lakoocha, Monkey Fruit.

RHS H1aUSDA 11-12Pet-safeIndoor 10–20 m tall (33–65 ft)

Watering rhythm

Direct sun (at least 4-6 hours)

Water young trees 2–3 times per week; established trees are moderately drought-tolerant and generally managed on natural rainfall in tropical climates.

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Light

Direct sun (at least 4-6 hours)

Soil

Deep, well-drained, slightly acidic to neutral loam (pH 6.0–7.0).

Humidity

55–80% RH

Temp

18–40°C

Pet safety

Pet-safe

Mature size

10–20 m tall (33–65 ft)

Care at a glance

Light

Most houseplants will scorch where monkey jack thrives. Give it the windowsill you'd otherwise leave empty because everything else burned there. Requires full sun for vigorous growth and fruiting. In South Asian agroforestry systems it is grown in open fields and forest margins where it receives full solar exposure. Shade-grown specimens are tall and thin with reduced fruiting; site in an unobstructed open position. A plant moved abruptly from low light to direct sun bleaches in 48 hours — always acclimatise over a week.

Watering

Aim for water young trees 2–3 times per week; established trees are moderately drought-tolerant and generally managed on natural rainfall in tropical climates. for monkey jack, but treat that as a starting point rather than a rule. A south-facing summer windowsill will dry the pot twice as fast as a north-facing winter room. Lift the pot; if it feels noticeably lighter than it did wet, water it. Tolerates a pronounced dry season once established, reflecting its native monsoonal climate. During dry spells supplement with deep irrigation every 10–14 days. Avoid waterlogging; the tree performs best on soils that drain freely between rainfalls. Newly planted specimens need consistent moisture for 12–18 months.

Soil and pot

Monkey Jack grows best in deep, well-drained, slightly acidic to neutral loam (ph 6.0–7.0).. Naturally found in fertile alluvial soils of river valleys and forest margins across India, Myanmar, Thailand, and Malaysia. Amend planting sites with compost to improve fertility and moisture retention in sandy soils, or drainage in clay. Compact, shallow soils restrict root development and reduce tree vigor. A pot with a working drainage hole is non-negotiable for this species — even free-draining mix will turn soggy in a closed planter. If you love the look of a decorative pot without a hole, use it as a cachepot around an inner nursery pot you can lift out to water.

Humidity and temperature

Monkey Jack sits happiest at around 55–80% RH humidity and 18–40°C (64–104°F). Native to monsoonal tropical climates with seasonally high humidity. Tolerates moderate dry-season humidity better than many tropical fruit trees. Grown outdoors in USDA zones 11–12 without supplemental humidity; in drier subtropical zones, heavy mulching and drip irrigation compensate. If you keep the room above 18–40°C year-round and avoid placing the plant near a cold draught, a hot radiator, or an air-conditioning vent, you have already handled the two biggest indoor stressors.

Fertilising

Feed monkey jack sparingly. Apply a balanced NPK fertiliser (15-15-15) twice yearly in spring and at the onset of the fruiting season. In organically managed systems, incorporate well-rotted cattle manure or compost as a surface mulch in early spring. Potassium supplementation in the run-up to fruiting improves fruit quality. Skip fertiliser entirely on a stressed, recently-repotted, or actively wilting plant — fertiliser salts make damage worse, not better. Wait for a round of healthy new growth before resuming a feeding rhythm.

Common problems

Below are the issues we see most often on monkey jack in the Growli community. Each is annotated with the most common cause so you know where to start.

  • Stem borers — Longhorn beetle larvae (Cerambycidae) tunnel into the trunk and main branches of mature trees, causing sawdust-like frass at entry holes and weakening structural limbs. Remove and destroy larvae manually with a wire probe; seal entry holes with a systemic insecticide paste in commercial orchards.
  • Fruit drop at immature stage — Irregular irrigation during the fruiting period or prolonged dry spells cause immature fruits to drop before maturity. Deep mulching and regular irrigation in the weeks following fruit set significantly reduce this problem.
  • Leaf rust and anthracnose — Fungal pathogens cause orange-brown pustules (rust) or dark, sunken lesions (anthracnose) on leaves and young shoots in humid, wet conditions. Improve air circulation around the canopy by pruning crossing branches; apply copper-based fungicide at the onset of wet season as a preventive measure.

Propagation

Raised primarily from fresh seed sown shortly after extraction from ripe fruit. Seeds are recalcitrant — viability drops within 1–2 weeks of drying. Sow at 26–30°C (79–86°F) in moist, fertile potting mix; germination takes 2–5 weeks. Vegetative propagation via budding or shield-grafting onto related Artocarpus rootstocks is practiced to perpetuate selected superior fruit types. Propagation is the cheapest, most satisfying way to expand a collection — and it doubles as insurance against losing a mature plant to an accident. Take a backup cutting once the parent is established and healthy.

Toxicity to pets

Monkey Jack is pet-safe. Artocarpus lakoocha (Moraceae) is not listed by ASPCA as toxic to dogs or cats. The latex sap common to Moraceae can cause mild skin irritation on contact, but the species has no documented systemic toxic principles for companion animals. Fruits are widely consumed by humans and wildlife. If you keep cats, dogs, or curious children in the house, weigh placement carefully — a high shelf or a hanging planter is enough for casual safety. For severe ingestion incidents, call your local vet and the ASPCA Animal Poison Control Center (in the US, 888-426-4435).

Pet-safety status is sourced from the ASPCA Toxic and Non-Toxic Plant List, which catalogues the most-asked-about plants for cats, dogs, and horses.

Monkey Jack care — frequently asked questions

What is the common name for Artocarpus lakoocha?

Artocarpus lakoocha is most commonly called Monkey Jack, but it is also known as Monkey Jack, Lakoocha, Monkey Fruit. The names refer to the same species, so care instructions for Monkey Jack apply identically to anything sold as Lakoocha.

How much light does monkey jack need?

Monkey Jack grows best in direct sun (at least 4-6 hours). Requires full sun for vigorous growth and fruiting. In South Asian agroforestry systems it is grown in open fields and forest margins where it receives full solar exposure. Shade-grown specimens are tall and thin with reduced fruiting; site in an unobstructed open position.

How often should I water monkey jack?

Water monkey jack water young trees 2–3 times per week; established trees are moderately drought-tolerant and generally managed on natural rainfall in tropical climates.. Tolerates a pronounced dry season once established, reflecting its native monsoonal climate. During dry spells supplement with deep irrigation every 10–14 days. Avoid waterlogging; the tree performs best on soils that drain freely between rainfalls. Newly planted specimens need consistent moisture for 12–18 months. The finger-test (or lifting the pot to feel its weight) beats a fixed weekly calendar because pot size, light, and season all change how fast the soil dries.

Is monkey jack toxic to cats and dogs?

Monkey Jack is pet-safe. Artocarpus lakoocha (Moraceae) is not listed by ASPCA as toxic to dogs or cats. The latex sap common to Moraceae can cause mild skin irritation on contact, but the species has no documented systemic toxic principles for companion animals. Fruits are widely consumed by humans and wildlife.

What USDA hardiness zone does monkey jack grow in?

Monkey Jack is rated for USDA zone 11-12 and RHS hardiness H1a. Outside that range, grow it as a container plant that overwinters indoors before the first hard frost.

Monkey Jack deep-dive guides

Every aspect of monkey jack care, each with its own calibrated guide:

Featured in these plant shortlists

Monkey Jack qualifies for 10 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

Related guides

Monkey Jack is also known as Monkey Jack, Lakoocha, and Monkey Fruit.