Fertilising guide
How to fertilise Begonia pavonina (Begonia pavonina)— schedule & NPK
Also called peacock begonia, iridescent begonia, blue begonia.
More about begonia pavonina
About Begonia pavonina
Begonia pavonina · also called peacock begonia, iridescent begonia · tropical
A rare Malaysian rainforest begonia whose leaves shimmer iridescent blue under low light, an adaptation by specialised chloroplasts to capture scarce photons on the forest floor. A demanding terrarium plant, it needs high humidity, warmth, low filtered light and gentle airflow. The blue sheen fades under bright light, so deliberately keep it dim.
Growth habit: Low, spreading rhizomatous begonia forming a clump of broad, pointed iridescent leaves; flowers are small pink and secondary to the foliage.
Watch for — Leaf-tip mineral burn: From hard tap water or fertiliser salts. Water with rain or distilled water and feed at low strength.
What fertiliser begonia pavonina actually wants — and why
Begonia pavonina is an easy, light foliage feeder — a half-strength balanced liquid feed through the growing months keeps it green without forcing weak, sappy growth.
A balanced general houseplant feed (roughly even N-P-K) is exactly right — it is grown for foliage, so steady, moderate nitrogen for healthy leaves is the goal, not a bloom or root formula.
For the language behind the three numbers on the bottle — what nitrogen, phosphorus and potassium each do — see the NPK ratio explained entry. The short version for begonia pavonina: match the feed to the job the plant is doing right now, not to a generic “plant food” on the shelf.
How often to feed begonia pavonina, and which months
Feeding only earns its keep while the plant is in active growth and can use the nutrients — pour feed into a dormant or low-light plant and it simply builds up as root-burning salt. For begonia pavonina:
Feed sparingly during the growing season with a quarter to half-strength balanced liquid feed every 4-6 weeks. It is sensitive to fertiliser salts, so under-feeding is far safer than over-feeding. Treat that as every 4-6 weeks between spring through early autumn (roughly March to September); ease off in autumn and stop entirely in the low light of winter.
The dormant-season rule matters more than the exact interval: skip feeding entirely when begonia pavonina is resting. For the wider context on indoor feeding rhythms across the seasons, the houseplant fertiliser schedule walks through the year month by month.
What strength to mix for begonia pavonina
Half strength is the safe default for begonia pavonina — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
Feeding always goes onto already-damp soil, never dry roots — water begonia pavonina first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the begonia pavonina watering schedule.
Signs you are over-feeding begonia pavonina
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for begonia pavonina:
- Brown, crispy leaf tips and edges with no sign of underwatering.
- A white, crusty salt deposit on the soil surface or pot rim.
- Weak, pale, stretched new growth that flops.
- Lower leaves yellow and drop while the soil is correctly watered.
Signs you are under-feeding begonia pavonina
- Uniformly pale or yellow-green leaves, oldest first.
- Noticeably small new leaves and stalled growth in good light and season.
- A generally tired, lacklustre look despite correct watering and light.
If the symptoms point at watering, light or roots rather than nutrition, the full begonia pavonina care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of begonia pavonina with plain water until it runs freely from the base every couple of months in the feeding season — it washes out the fertiliser salts that cause brown tips.
Organic vs synthetic feeds for begonia pavonina
Organic options
A diluted seaweed or worm-casting feed, or fish emulsion if you can tolerate the smell indoors. UK: Westland or Baby Bio Organic, dilute seaweed; US: Espoma Indoor! or Neptune's Harvest fish & seaweed. Slow, gentle and hard to overdo.
Synthetic / liquid feeds
A general-purpose houseplant liquid at half strength — UK: Baby Bio, Westland Houseplant Feed or Phostrogen; US: Miracle-Gro Indoor Plant Food or Schultz. Convenient and fast-acting; the only risk is overdoing it.
Brand names are examples, not endorsements, and UK and US ranges differ — check the label’s own NPK and dilution rate, since formulations change.
Fertilising begonia pavonina — frequently asked questions
What fertiliser does begonia pavonina need?
A balanced general houseplant feed (roughly even N-P-K) is exactly right — it is grown for foliage, so steady, moderate nitrogen for healthy leaves is the goal, not a bloom or root formula. Begonia pavonina is an easy, light foliage feeder — a half-strength balanced liquid feed through the growing months keeps it green without forcing weak, sappy growth.
How often should I feed begonia pavonina?
Feed sparingly during the growing season with a quarter to half-strength balanced liquid feed every 4-6 weeks. It is sensitive to fertiliser salts, so under-feeding is far safer than over-feeding. Feed sparingly during the growing season with a quarter to half-strength balanced liquid feed every 4-6 weeks. It is sensitive to fertiliser salts, so under-feeding is far safer than over-feeding. Treat that as every 4-6 weeks between spring through early autumn (roughly March to September); ease off in autumn and stop entirely in the low light of winter.
What strength of feed for begonia pavonina?
Half strength is the safe default for begonia pavonina — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding begonia pavonina look like?
Brown, crispy leaf tips and edges with no sign of underwatering. A white, crusty salt deposit on the soil surface or pot rim. Weak, pale, stretched new growth that flops. Lower leaves yellow and drop while the soil is correctly watered. Feeding begonia pavonina year-round on a fixed schedule, including dark winter months, is the most common mistake — it cannot use the nutrients in low light and the surplus simply burns the roots and crusts the soil.
Should I flush the soil of begonia pavonina?
Flush the pot of begonia pavonina with plain water until it runs freely from the base every couple of months in the feeding season — it washes out the fertiliser salts that cause brown tips.
Keep reading
- Begonia pavonina care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water begonia pavonina — the watering schedule
- The houseplant fertiliser schedule — feeding through the year
- NPK ratio explained — what the three numbers on the bottle mean
- How to fertilise monstera
- How to fertilise pothos
- How to fertilise fiddle leaf fig
- All 2464 fertilising guides in the Growli library