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Plant care

Custard Biriba (Biriba) care

Rollinia deliciosa

Also called Biriba, Custard Biriba, Wild Sugar Apple, Lemon Meringue Fruit.

RHS H1aUSDA 10b–12Pet-safeIndoor 5–10 m tall (16–33 ft)

Watering rhythm

Direct sun (at least 4-6 hours)

2–3 times per week in growing season; reduce in cooler months

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Light

Direct sun (at least 4-6 hours)

Soil

Rich, well-drained loam or sandy loam with high organic matter

Humidity

70–90% RH

Temp

18–35°C

Pet safety

Pet-safe

Mature size

5–10 m tall (16–33 ft)

Care at a glance

Light

Custard Biriba needs sun on the leaves, not just bright ambient room light. Requires full sun (6–8 hours of direct sunlight daily) for vigorous growth and heavy fruiting. Tolerates partial shade when young but fruit production drops significantly without full sun exposure. A south or west-facing windowsill in the northern hemisphere is the default; anywhere else, expect the plant to stretch and pale out within a season.

Watering

Water custard biriba 2–3 times per week in growing season; reduce in cooler months. The actual day count varies with pot size, light, and season — the finger test (or lifting the pot to feel its weight) is more reliable than a fixed calendar. Empty any drainage saucer afterwards so the pot isn't sitting in water. Needs consistently moist soil — never waterlogged. Water deeply to encourage a deep root system. Drought stress during flowering or fruit set causes drop. Mulch heavily around the root zone to retain moisture.

Soil and pot

Custard Biriba grows best in rich, well-drained loam or sandy loam with high organic matter. Prefers fertile, slightly acidic to neutral soil (pH 5.5–7.0). Incorporates generous compost or aged manure at planting. Poor drainage causes root rot; raised beds or mounded planting improve aeration in clay-heavy sites. 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

Custard Biriba sits happiest at around 70–90% RH humidity and 18–35°C (64–95°F). Native to humid Amazonian rainforest and demands high ambient humidity. In drier climates, fruit quality suffers and leaf scorch occurs. Misting and mulching help, but true performance requires a tropical or subtropical climate. If you keep the room above 18–35°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 custard biriba sparingly. Apply a balanced slow-release fertiliser (e.g. 10-10-10) every 6–8 weeks during the growing season. Supplement with additional potassium during fruit development. Avoid excess nitrogen once the tree matures, as it promotes foliage over fruit. 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 custard biriba in the Growli community. Each is annotated with the most common cause so you know where to start.

  • Root rot — Caused by waterlogged or poorly drained soil. Symptoms include yellowing leaves and wilting despite moist soil. Improve drainage immediately and reduce watering frequency. In severe cases, lift and replant in a raised bed with fresh, well-draining mix.
  • Fruit fly damage — Tropical fruit flies (Anastrepha spp., Bactrocera spp.) attack ripening fruit, causing internal rot. Use exclusion bags over developing fruit clusters or apply approved protein bait traps. Harvest at first sign of ripeness, as over-ripe fruit is most vulnerable.
  • Cold damage — Even brief temperatures below 5°C (41°F) cause leaf blackening and branch dieback. Protect with horticultural fleece and move potted specimens under cover. Recovery from light frost is possible if the root system is undamaged.

Propagation

Primarily by seed, which germinates in 2–4 weeks when fresh (viability drops sharply after 2 weeks of drying). Sow in warm, moist seedling mix at 25–30°C. Air-layering is used commercially to produce true-to-type trees and reduce juvenile period. Grafting onto Annona rootstock is possible but less common. 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

Custard Biriba is pet-safe. Rollinia deliciosa is not listed by ASPCA as toxic. The fruit and foliage have no documented toxic principle to dogs or cats; the genus belongs to Annonaceae, which has no widespread toxicity record for companion animals. Considered safe, though the large seeds should not be ingested. 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.

Custard Biriba care — frequently asked questions

What is the common name for Rollinia deliciosa?

Rollinia deliciosa is most commonly called Custard Biriba, but it is also known as Biriba, Custard Biriba, Wild Sugar Apple, Lemon Meringue Fruit. The names refer to the same species, so care instructions for Custard Biriba apply identically to anything sold as Biriba.

How much light does custard biriba need?

Custard Biriba grows best in direct sun (at least 4-6 hours). Requires full sun (6–8 hours of direct sunlight daily) for vigorous growth and heavy fruiting. Tolerates partial shade when young but fruit production drops significantly without full sun exposure.

How often should I water custard biriba?

Water custard biriba 2–3 times per week in growing season; reduce in cooler months. Needs consistently moist soil — never waterlogged. Water deeply to encourage a deep root system. Drought stress during flowering or fruit set causes drop. Mulch heavily around the root zone to retain moisture. 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 custard biriba toxic to cats and dogs?

Custard Biriba is pet-safe. Rollinia deliciosa is not listed by ASPCA as toxic. The fruit and foliage have no documented toxic principle to dogs or cats; the genus belongs to Annonaceae, which has no widespread toxicity record for companion animals. Considered safe, though the large seeds should not be ingested.

What USDA hardiness zone does custard biriba grow in?

Custard Biriba is rated for USDA zone 10b–12 and RHS hardiness H1a. Outside that range, grow it as a container plant that overwinters indoors before the first hard frost.

Custard Biriba deep-dive guides

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

Featured in these plant shortlists

Custard Biriba 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

Custard Biriba is also known as Biriba, Custard Biriba, Wild Sugar Apple, and Lemon Meringue Fruit.