Growli

Plant care

Junglesop (Oubli) care

Anonidium mannii

Also called Oubli, Ibo Custard Apple, Wild Soursop.

RHS H1aUSDA 12Mildly toxic to petsIndoor 10–25 m in native forest

Watering rhythm

3-5days

Keep consistently moist; water every 3–5 days, never allowing the root zone to fully dry

Light

Bright indirect light (just back from a sunny window)

Soil

Deep, humus-rich, well-drained tropical loam; pH 5.5–7.0

Humidity

75–90%

Temp

22–35°C

Pet safety

Mildly toxic to pets

Mature size

10–25 m in native forest

Care at a glance

Light

Bright but filtered. Junglesop burns within days in unfiltered south-facing summer sun, and stops growing within months in deep shade. Young trees are understorey plants and need filtered or partial shade. Mature trees grow into the canopy and tolerate more sun. Protect from harsh direct midday sun in the first 3 years. If you only have a south window, set the plant back 1.5 m or hang a sheer curtain — both knock the intensity down into the right range.

Watering

Crops like junglesop reward consistent watering — keep consistently moist; water every 3–5 days, never allowing the root zone to fully dry. The mistake is the daily light sprinkle: it never reaches the deeper roots. A long soak twice a week beats a five-minute splash every day. Prefers the constant moisture of its equatorial forest habitat. High rainfall equivalent is needed; mulch heavily and water deeply. Poor drainage is still a risk — root rot is common in container culture.

Soil and pot

Junglesop grows best in deep, humus-rich, well-drained tropical loam; ph 5.5–7.0. Incorporate generous compost and maintain a thick organic mulch layer. The soil should be moisture-retentive but never waterlogged. Avoid compacted or alkaline substrates. 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

Junglesop sits happiest at around 75–90% humidity and 22–35°C (72–95°F). Requires the very high humidity of equatorial rainforest margins. Outside tropical Africa, cultivation demands a heated glasshouse with misting systems or equivalent environment. If you keep the room above 22–35°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 junglesop sparingly. Apply a balanced slow-release fertiliser with micronutrients twice yearly (spring and early summer). Supplement with monthly liquid feeds during active growth. Magnesium and boron deficiencies are occasionally observed. 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 junglesop in the Growli community. Each is annotated with the most common cause so you know where to start.

  • Extremely slow growth outside tropicsOutside equatorial Africa, growth is very slow without consistent heat above 22°C; heated glasshouse cultivation is essential in temperate climates.
  • Root rotDespite high moisture needs, standing water causes fatal root rot; ensure substrate drainage even in wet conditions.
  • Fruit rarely formed in cultivationFruiting requires decades and ideal tropical conditions; specimens outside Africa are usually non-fruiting botanical curiosities.
  • Mealybug and scaleCommon in glasshouse conditions; treat with insecticidal soap or neem oil.
  • Low humidity damageLeaf edge browning and leaf drop occur below 70% humidity; invest in misting or humidifiers for indoor cultivation.

Companion plants

Junglesop pairs well with Cocoa Tree, Kola Nut, Breadfruit, and African Oil Palm. These are species with similar light and water needs, so you can grow them in the same bed or container without conflict.

Propagation

Primarily from fresh seed sown immediately after extraction; germination is erratic at 3–12 weeks in warm, humid conditions. Vegetative propagation is uncommonly practised for this species. Grafting onto related Annonaceae rootstocks is theoretically possible but rarely documented. 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

Junglesop is mildly toxic to pets. Anonidium mannii is not listed by the ASPCA. As a member of the Annonaceae family, the plant contains Annonaceous acetogenins — compounds that are toxic to nerve cells in large doses and are under study for links to atypical Parkinsonism in populations consuming large amounts of related species (Annona muricata). Pets should not be allowed to chew leaves, bark, or seeds. Due to insufficient species-specific veterinary data, a 'mildly-toxic' rating is applied precautionarily. 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.

Junglesop care — frequently asked questions

What is the common name for Anonidium mannii?

Anonidium mannii is most commonly called Junglesop, but it is also known as Oubli, Ibo Custard Apple, Wild Soursop. The names refer to the same species, so care instructions for Junglesop apply identically to anything sold as Oubli.

How much light does junglesop need?

Junglesop grows best in bright indirect light (just back from a sunny window). Young trees are understorey plants and need filtered or partial shade. Mature trees grow into the canopy and tolerate more sun. Protect from harsh direct midday sun in the first 3 years.

How often should I water junglesop?

Water junglesop keep consistently moist; water every 3–5 days, never allowing the root zone to fully dry. Prefers the constant moisture of its equatorial forest habitat. High rainfall equivalent is needed; mulch heavily and water deeply. Poor drainage is still a risk — root rot is common in container culture. 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 junglesop toxic to cats and dogs?

Junglesop is mildly toxic to pets. Anonidium mannii is not listed by the ASPCA. As a member of the Annonaceae family, the plant contains Annonaceous acetogenins — compounds that are toxic to nerve cells in large doses and are under study for links to atypical Parkinsonism in populations consuming large amounts of related species (Annona muricata). Pets should not be allowed to chew leaves, bark, or seeds. Due to insufficient species-specific veterinary data, a 'mildly-toxic' rating is applied precautionarily.

What USDA hardiness zone does junglesop grow in?

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

Junglesop deep-dive guides

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

Related guides

Junglesop is also known as Oubli, Ibo Custard Apple, and Wild Soursop.