Light
Bright indirect • approx. 10,000–20,000 lux








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Begonia amphioxus
Light
Bright indirect • approx. 10,000–20,000 lux
Watering
Water when ~25–40% dry
Substrate
Fine but airy • Moisture-buffered • Balanced • Fine
Temperature
Ideal: 20–26 °C • Avoid below: 15 °C
Humidity
Humid 60–80 % +
Growth habit
Upright shrub-like herbaceous perennial.
Support
not needed
Growth speed
Average
Max size indoors
Max. height: 40 cm • Max. spread: 40 cm
Toxicity & safety
Toxic
Origin & habitat
Native to Borneo (Sabah)
Outdoor growing
Outside from 15 °C · sheltered spot
These care values are quick reference points for indoor growing. Use them as a guide, then adjust for pot size, substrate, temperature and how quickly the substrate dries.
For more detail, read the full product description or visit our Plant Care Guides.
Begonia amphioxus has narrow green leaves marked with red dots and red edges. This compact species comes from Sabah in Malaysian Borneo and grows on fine upright stems, with leaves that taper strongly at both ends.
It stays small and needs high, steady humidity to reduce brown edges and leaf spotting. The leaves react quickly when humidity drops, watering becomes uneven or air sits still for too long. A humid cabinet, small terrarium or enclosed display helps keep the leaves from drying at the edges.
Begonia amphioxus comes from shaded, humid limestone habitats in Sabah. It grows best with warmth, light moisture and gentle airflow.
Place Begonia amphioxus in bright filtered light to support its red markings, while protecting the narrow leaves from hot sun through glass.
Keep humidity high, ideally around 70% or higher. Water lightly and regularly so the substrate stays evenly moist, while letting the top layer dry slightly between waterings. Keep the fine roots lightly moist.
Use a fine, airy substrate in a small pot matched to the root system. Mix moisture-holding material with pumice, perlite or fine lava rock so the substrate drains well and still holds a little water. Keep temperatures around 20–26°C. In enclosed growing, gentle airflow is essential so condensation does not sit on the leaves.
Feed at very low strength during active growth. Strong fertiliser can damage the fine leaves and leave salts in the substrate. Stem cuttings root well in warm, humid conditions with steady moisture.
Brown leaf edges usually come from humidity drops, watering gaps or fertiliser salts. Stem collapse often follows cool, saturated substrate. Pale stretched growth points to light that is too weak.
Melting or spotted leaves often appear when condensation sits on the foliage and airflow is poor. Increase gentle airflow around the plant, remove damaged leaves and keep watering even. New leaves may also come out damaged after sudden changes in moisture or fertiliser that is too strong.
Keep Begonia amphioxus out of reach of pets and children who may nibble plant material. Begonias contain soluble calcium oxalates, especially in tissues below the substrate surface.
Begonia honours Michel Bégon. The name amphioxus means sharp at both ends, matching the narrow leaves that taper strongly at the tip and base.
Plant names, growth habits, natural habitats and indoor care guidance are checked against trusted botanical, habitat and horticultural references before publication.View our plant care resources and references.
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