Introduction
Annona mucosa Jacq. — still widely known in cultivation as Rollinia mucosa (Jacq.) Baill. — is a tropical fruit tree in the Annonaceae family, native to Tropical America and also native to Puerto Rico. It is grown for its unusual segmented yellow fruit with soft, creamy, sweet pulp.
- Accepted name
- Annona mucosa Jacq.
- Synonym
- Rollinia mucosa (Jacq.) Baill.
- Family
- Annonaceae
- Common names
- Biribá, Biriba, Rollinia, Brazilian Custard Apple, Beribá, Fruta-da-condessa
- Native range
- Tropical America, including Puerto Rico
- Difficulty
- Moderate
Seed freshness
Freshness is the single most important variable with Annonaceae seed of this type. Viability declines as the seed dries and ages.
- Plant promptly
- Sow as soon as practical after the seeds arrive rather than storing them.
- Short-term holding
- If you must wait, keep the seeds cool, shaded and slightly moist in a breathable container.
- Avoid
- Deliberate drying for storage, and sealing damp seed in airtight plastic, which encourages mold.
- No guarantee
- No germination percentage or germination date is promised; results depend on freshness, warmth, moisture and your conditions.
Seed preparation
- Cleaning
- Rinse away any remaining pulp residue and pat the seeds dry before sowing — residue invites mold.
- Soaking
- An optional soak in clean, room-temperature water for about 24 hours helps rehydrate the seed. Sow the same day.
- Scarification
- Not required. If you choose to lightly abrade the hard coat, do so very gently and avoid damaging the embryo.
- Sanitizing
- An optional short soak in dilute hydrogen peroxide solution can reduce surface fungus.
Sowing and depth
- Depth
- Roughly 1–2 cm (about half an inch). Deep burial is a frequent cause of failure.
- Orientation
- Lay the seed on its side and cover lightly.
- Container
- Deep cells or deep pots with generous drainage holes; the species forms a strong taproot.
- Spacing
- One seed per container so roots are never disturbed at transplant.
Growing medium and moisture
- Medium
- Light, fertile and free-draining: quality potting soil or coco coir with perlite and a little compost.
- Moisture
- Consistently moist like a wrung-out sponge — never saturated, never bone dry.
- Watering
- Water thoroughly and let excess drain rather than giving frequent light sips.
- Humidity
- A dome or loose clear bag helps, but ventilate regularly to avoid stagnant, moldy surfaces.
Temperature and germination
- Warmth
- Steady warmth is the biggest lever. Cool medium slows germination substantially or stalls it entirely.
- Bottom heat
- Gentle bottom heat can help in cooler indoor conditions.
- Timing
- Germination is often slow and uneven; seeds in the same batch commonly emerge weeks apart.
- Patience
- Keep the whole tray warm and moist for an extended period before concluding that seeds have failed.
Seedling care and light
- First light
- Bright filtered or indirect light immediately after emergence.
- Progression
- Increase sun exposure gradually over several weeks rather than in one abrupt move.
- Airflow
- Gentle air movement reduces damping-off; strong drying wind damages soft foliage.
- Feeding
- Do not fertilize seeds or very young seedlings. Feed lightly only once growth is active.
Receiving a live Biribá plant
If you purchased the 7–9 inch live plant rather than seed, begin here. Shipping changes light, airflow and humidity abruptly, so the first task is a calm transition rather than immediate repotting or feeding.
- On arrival
- Unpack promptly, inspect the foliage and stem, then feel the substrate before deciding whether to water.
- First position
- Use bright filtered light protected from harsh afternoon sun and drying wind.
- Water
- If the substrate is drying, water thoroughly and drain fully; do not add water to an already moist root zone.
- Sun progression
- Introduce gentler direct sun first and increase exposure over several days as the leaves adjust.
- Repotting
- Wait until the plant settles unless drainage, damage or another actual condition requires immediate attention.
- Normal transition
- Minor droop, a blemished older leaf or slight yellowing may occur after transit; stable tissue and new growth are better recovery signals.
Transplanting, soil and drainage
- Potting up
- Move up one container size at a time as roots fill the pot, keeping the root ball intact.
- Taproot
- Avoid root disturbance — the taproot resents being broken or cut.
- Soil
- Fertile, organic-rich and free draining; avoid heavy compacted soils.
- Site
- Plant out only in frost-free climates, in a sheltered, sunny, well-drained position.
Watering and fertilization of established plants
- Watering
- Keep the root zone evenly moist, letting the surface dry slightly between waterings. Avoid drought and prolonged waterlogging.
- Mulch
- Mulch the root zone to hold moisture and keep roots cool, keeping mulch away from the trunk.
- Fertilizer
- A balanced fertilizer at label rates during active growth. Avoid heavy, forced feeding.
- Season
- Reduce feeding and watering when growth naturally slows in cooler weather.
Container growing and cold climates
- Containers
- Use deep containers with drainage holes; container plants stay smaller and dry out faster.
- Outside the tropics
- Grow in a container and move it to a warm, bright, sheltered space before cold weather arrives.
- Cold
- The species is not cold hardy. Protect from frost and cold drafts.
- Indoor winters
- Provide the brightest position available and reduce watering while growth slows.
Mature tree, flowering and pollination
- Habit
- A tropical tree that grows fairly quickly in suitable warm, humid climates with good soil.
- Flowers
- Annonaceae flowers have parts that mature at different times, which limits self-pollination.
- Hand pollination
- Growers of Annona relatives commonly hand pollinate to improve fruit set.
- Time to fruit
- Varies widely with climate, care and conditions. No fruiting age or yield is promised.
Fruit development and harvest
- Development
- Fruit develops over months, forming the distinctive raised, segmented protrusions as it grows.
- Ripening
- Skin turns yellow and the fruit softens noticeably as it matures.
- Harvest
- Judge by color change and slight softening rather than a fixed calendar date; ripe fruit does not keep long.
- Variation
- Seed-grown trees vary — fruit is not guaranteed to match the parent in size, shape, flavor or productivity.
Step-by-step germination
- 1
Sow fresh seed promptly
Plant as soon as practical after arrival. Optionally soak in clean room-temperature water for about 24 hours first.
- 2
Fill deep containers
Use deep cells or pots with drainage holes, filled with a light, fertile, free-draining medium.
- 3
Sow shallowly
Lay each seed on its side and cover with roughly 1–2 cm of medium. One seed per container.
- 4
Water in
Water thoroughly, let excess drain, and keep the medium evenly moist afterwards.
- 5
Keep warm
Maintain steady warmth. Gentle bottom heat helps in cooler indoor conditions.
- 6
Maintain humidity, ventilate
A dome or loose bag holds moisture; open it regularly so the surface does not stay stagnant.
- 7
Wait patiently
Germination is slow and uneven. Keep conditions steady for an extended period rather than disturbing the seeds.
- 8
Give filtered light
Once shoots appear, provide bright filtered light and gentle airflow.
- 9
Increase sun gradually
Move seedlings toward full sun in stages over several weeks.
- 10
Pot up carefully
Move up one size at a time as roots fill the container, keeping the root ball and taproot intact.
- 11
Feed lightly once growing
Begin balanced feeding at label rates only after the plant is established and actively growing.
- 12
Protect from cold
Shelter from frost and cold drafts; in cooler climates overwinter the container indoors in bright warmth.
Common problems and fixes
Seeds never germinate
Likely cause: Old or dried-out seed, or medium kept too cool.
Fix: Sow fresh seed promptly and keep the medium consistently warm and moist.
Seeds rot in the medium
Likely cause: Waterlogged or poorly drained mix, or stagnant humidity.
Fix: Use a free-draining medium in containers with drainage holes and ventilate covered trays regularly.
Shoot never reaches the surface
Likely cause: Seed sown too deeply.
Fix: Sow at roughly 1–2 cm and cover lightly.
Seedlings collapse at the soil line
Likely cause: Damping-off in wet, stagnant conditions.
Fix: Reduce watering, improve drainage and airflow, and avoid crowding.
Seedling leaves scorch
Likely cause: Moved into intense direct sun too quickly.
Fix: Return to filtered light and increase exposure gradually over several weeks.
Growth stalls after potting up
Likely cause: Root or taproot disturbance during transplanting.
Fix: Keep the root ball intact, pot up one size at a time and keep conditions warm and stable afterwards.
A shipped plant droops after arrival
Likely cause: Abrupt changes in light, humidity and airflow, or a root zone that is too wet or too dry.
Fix: Place it in bright filtered light, check substrate moisture by touch, correct only what is needed and postpone fertilizer or optional repotting while it settles.
Leaves yellow and growth slows
Likely cause: Waterlogged soil, cold exposure or depleted nutrition.
Fix: Improve drainage, protect from cold and feed lightly during active growth.
Flowers drop without setting fruit
Likely cause: Limited self-pollination typical of Annonaceae, or environmental stress.
Fix: Consider hand pollination and keep moisture, warmth and feeding consistent.
Frequently asked questions
- What is Rollinia mucosa?
- Rollinia mucosa (Jacq.) Baill. is the long-standing horticultural name for the tropical fruit tree known as Biribá. It is a botanical synonym of the currently accepted name, Annona mucosa Jacq.
- What is Annona mucosa?
- Annona mucosa Jacq. is the currently accepted scientific name for Biribá, a tropical fruit tree in the Annonaceae family native to Tropical America.
- Are Annona mucosa and Rollinia mucosa the same plant?
- Yes. They are two names for the same species, not two different plants. Modern references such as Kew's Plants of the World Online accept Annona mucosa Jacq. and treat Rollinia mucosa (Jacq.) Baill. as a synonym.
- What is Biribá?
- Biribá is the most widely used common name for Annona mucosa / Rollinia mucosa — a tropical fruit tree whose fruit has a distinctive segmented, protruding surface and turns yellow when mature.
- What other names is Biribá known by?
- It is also called Biriba, Rollinia, Brazilian Custard Apple, Beribá and Fruta-da-condessa. These are regional common names rather than official English names.
- Where is Annona mucosa native?
- It is native to Tropical America.
- Is Annona mucosa native to Puerto Rico?
- Yes, the species is native to Puerto Rico as part of its Tropical American native range.
- What does Biribá fruit look like?
- The developing fruit forms distinctive raised, segmented protrusions across its surface, and the skin turns yellow as the fruit matures.
- What does Biribá taste like?
- The ripe pulp is soft and creamy with a sweet tropical flavor. Flavor perception varies between individual fruits and between people.
- Is fruit included with either Biribá listing?
- No. Fruit photographs identify the mature species. The seed listing contains seeds only, while the live-plant listing contains one young plant only.
- How many seeds will I receive?
- 15 fresh Annona mucosa / Rollinia mucosa seeds for planting.
- Are these seeds fresh?
- Yes — they are sold as fresh seed and packed to protect freshness in transit. Plant them promptly after arrival rather than storing them dry.
- What arrives with the live-plant listing?
- One live Annona mucosa / Biribá plant approximately 7–9 inches tall. Seeds and fruit are not included, and individual plants vary naturally.
- Should I transplant the live plant immediately?
- Usually not. Let it acclimate first unless poor drainage, damage or another real condition makes immediate repotting necessary.
- How should I introduce a shipped plant to sun?
- Begin in bright filtered light, then introduce gentler direct sun and increase exposure gradually over several days. Avoid moving it straight from a box into harsh full sun.
- Is temporary leaf stress after shipping normal?
- Minor drooping, slight yellowing or a marked older leaf can occur after transit. Check moisture and keep conditions stable; new growth is a more useful sign of recovery.
- How should I plant Rollinia seeds?
- Sow one seed per deep container in a light, fertile, free-draining medium, lay it on its side, cover shallowly, water in, and keep the medium warm and evenly moist.
- How deep should the seeds be planted?
- Roughly 1–2 cm (about half an inch). Deep burial is a common cause of failure.
- How long can germination take?
- Germination is often slow and uneven and commonly takes several weeks, with seeds in the same batch emerging at different times. No specific germination date is promised.
- What temperature is best for germination?
- Steady warmth typical of tropical conditions. Cool medium slows germination substantially or stalls it, so gentle bottom heat helps in cooler indoor settings.
- Does Biribá need full sun?
- Established plants grow best in full sun in a suitable climate. Young seedlings should start in bright filtered light and be moved toward full sun gradually.
- Can Biribá grow in a container?
- Yes. Use a deep container with generous drainage holes and a fertile, free-draining mix. Container plants stay smaller and need more attentive watering and feeding.
- Can it be grown outside the tropics?
- Only with protection. The species is not cold hardy, so outside frost-free climates it is grown in containers and overwintered in a warm, bright, sheltered space.
- How large can the tree become?
- It grows into a tropical fruit tree of substantial size in the ground under favorable conditions, while container-grown plants remain considerably smaller. Final size depends on climate, soil and care.
- How long can a seed-grown tree take to fruit?
- Time to first fruiting varies widely with climate, care and growing conditions. No fruiting age, yield or fruit production is promised.
- Does it need cross-pollination?
- Annonaceae flowers have parts that mature at different times, which limits self-pollination. Growers of Annona relatives commonly hand pollinate, and having more than one tree can help fruit set.
- How do I know when the fruit is ripe?
- Ripening is judged by the skin turning yellow and the fruit softening noticeably, rather than by a fixed calendar date. Fully ripe fruit does not keep long.
View the 15 Fresh Rollinia mucosa Seeds – Biribá / Annona mucosa Tropical Fruit listing