Light
Medium to bright
Ideal spot
Begonia amphioxus · Foliage plant
Medium to bright
Ideal spot
about weekly
In the growing season
Moderate
Moderate grower
Toxic
Cats & dogs
Begonia Amphioxus (Begonia amphioxus) belongs to the Begoniaceae family and is a moderate houseplant to look after. This moderate grower plant is happiest in medium to bright and reaches 20–60 cm indoors.
For watering, the rule is simple: keep evenly moist. In the growing season it needs water roughly every 5 days, dropping to every 9 days in winter. Use the watering calculator below to tune that rhythm to your pot size, light and household humidity.
Important: Begonia Amphioxus is toxic to pets — keep it out of reach of cats, dogs and children.
Set your pot size, light and humidity — the calculator tunes the watering rhythm to your home.
Light at the spot
Humidity
Season
Water Begonia Amphioxus
every 5 days
≈ about weekly · 6× per month
Let the top 2–3 cm dry and finger-check before watering again.
Begonia Amphioxus prefers medium to bright but will cope with medium, indirect. Harsh midday sun can scorch sensitive leaves, while too little light leads to leggy, sparse growth.
Keep Begonia Amphioxus between 16–26 °C and aim for around 60% humidity (45% minimum). Below 12 °C it risks cold damage — keep it away from draughty windows and radiators.
16–26 °C
Not below 12 °C
60%
45% minimum
Keep evenly moist
Soil between waterings
Pot Begonia Amphioxus in light, airy, free-draining mix. A drainage hole is essential — soggy, airless soil is the single most common way houseplants die.
Begonias are toxic to cats and dogs — the underground tubers most of all — causing mouth irritation and vomiting; mildly irritating to people.
The best ways to propagate Begonia Amphioxus are leaf cuttings, stem cuttings and division. Late spring and summer are ideal, when the plant is growing most actively.
A single Rex begonia leaf, pinned flat on damp soil and nicked along its veins, will sprout a whole row of new plantlets.
In the growing season Begonia Amphioxus needs watering about weekly (about every 5 days in a 16 cm pot at medium light), and much less in winter — roughly every 9 days. Use the watering calculator above to get the exact interval for your conditions.
Begonia Amphioxus thrives in medium to bright. A spot near a bright window out of harsh midday sun is ideal; give it a little more light in winter.
Begonia Amphioxus is toxic to pets. Begonias are toxic to cats and dogs — the underground tubers most of all — causing mouth irritation and vomiting; mildly irritating to people.
The most common problem with Begonia Amphioxus is powdery mildew. Check your watering and drainage first — most issues trace back to too much or too little water.
The best ways to propagate Begonia Amphioxus are leaf cuttings, stem cuttings and division. Late spring and summer are ideal, when the plant is growing most actively.
Indoors Begonia Amphioxus typically reaches 20–60 cm. With the right light and occasional repotting it stays compact and bushy.
Care data last verified on 15 June 2026.
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