Fertilising guide
How to fertilise Begonia 'Corallina de Lucerna' (Begonia × 'Corallina de Lucerna')— schedule & NPK
Also called coral begonia, Corallina de Lucerna begonia.
More about begonia 'corallina de lucerna'
About Begonia 'Corallina de Lucerna'
Begonia × 'Corallina de Lucerna' · also called coral begonia, Corallina de Lucerna begonia · houseplant
Begonia 'Corallina de Lucerna' is a heritage angel-wing cane begonia with large olive leaves silver-spotted above and red beneath, bearing pendulous clusters of coral-red flowers over a long season. Tall and vigorous on bamboo-like stems, it is one of the easiest cane begonias, thriving in bright indirect light with even moisture and warmth.
Growth habit: Vigorous cane-type begonia with upright, jointed stems, large angel-wing leaves and abundant drooping coral flower clusters; tall and shrubby, benefiting from staking and pinching.
What fertiliser begonia 'corallina de lucerna' actually wants — and why
Begonia 'Corallina de Lucerna' 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 'corallina de lucerna': 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 'corallina de lucerna', 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 'corallina de lucerna':
Feed every 2 weeks spring through autumn with a half-strength balanced or bloom-leaning liquid fertiliser to fuel its long flowering season. Reduce or stop in winter. Treat that as every 2 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 'corallina de lucerna' 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 'corallina de lucerna'
Half strength is the safe default for begonia 'corallina de lucerna' — 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 'corallina de lucerna' first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the begonia 'corallina de lucerna' watering schedule.
Signs you are over-feeding begonia 'corallina de lucerna'
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for begonia 'corallina de lucerna':
- 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 'corallina de lucerna'
- 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 'corallina de lucerna' care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of begonia 'corallina de lucerna' 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 'corallina de lucerna'
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 'corallina de lucerna' — frequently asked questions
What fertiliser does begonia 'corallina de lucerna' 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 'Corallina de Lucerna' 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 'corallina de lucerna'?
Feed every 2 weeks spring through autumn with a half-strength balanced or bloom-leaning liquid fertiliser to fuel its long flowering season. Reduce or stop in winter. Feed every 2 weeks spring through autumn with a half-strength balanced or bloom-leaning liquid fertiliser to fuel its long flowering season. Reduce or stop in winter. Treat that as every 2 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 'corallina de lucerna'?
Half strength is the safe default for begonia 'corallina de lucerna' — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding begonia 'corallina de lucerna' 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 'corallina de lucerna' 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 'corallina de lucerna'?
Flush the pot of begonia 'corallina de lucerna' 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 'Corallina de Lucerna' care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water begonia 'corallina de lucerna' — 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 snake plant
- How to fertilise dracaena
- How to fertilise peperomia
- All 2464 fertilising guides in the Growli library