Fertilising guide
How to fertilise Eyelash Begonia (Begonia bowerae)— schedule & NPK
Also called Eyelash Begonia, Eyelash-leaf Begonia, Miniature Eyelash Begonia.
More about eyelash begonia
About Eyelash Begonia
Begonia bowerae · also called Eyelash Begonia, Eyelash-leaf Begonia · houseplant
The eyelash begonia is a compact, rhizomatous foliage houseplant prized for emerald leaves edged with chocolate markings and fine "eyelash" hairs. It wants bright indirect light, consistently-but-not-soggy moist soil, and high humidity around 50 to 70 percent. The ASPCA lists Begonia as toxic to cats and dogs, so keep it out of reach.
Growth habit: Evergreen, low-growing rhizomatous perennial with a creeping rhizome that spreads sideways across the soil surface, forming a dense mound of small, heart-shaped, bristle-edged leaves. Small pale-pink to white flowers may appear in late winter to spring.
Watch for — Faded colour or scorched patches: Too much direct sun bleaches the chocolate markings and burns dry brown spots into the leaves. Move to bright indirect light.
What fertiliser eyelash begonia actually wants — and why
Eyelash Begonia 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 eyelash begonia: 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 eyelash begonia, 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 eyelash begonia:
Feed with a balanced liquid houseplant fertiliser diluted to roughly half strength every 2-4 weeks through spring and summer. Stop or greatly reduce feeding in autumn and winter when growth slows, and never feed dry soil. Treat that as every 2-4 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 eyelash begonia 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 eyelash begonia
Half strength is the safe default for eyelash begonia — 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 eyelash begonia first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the eyelash begonia watering schedule.
Signs you are over-feeding eyelash begonia
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for eyelash begonia:
- 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 eyelash begonia
- 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 eyelash begonia care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of eyelash begonia 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 eyelash begonia
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 eyelash begonia — frequently asked questions
What fertiliser does eyelash begonia 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. Eyelash Begonia 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 eyelash begonia?
Feed with a balanced liquid houseplant fertiliser diluted to roughly half strength every 2-4 weeks through spring and summer. Stop or greatly reduce feeding in autumn and winter when growth slows, and never feed dry soil. Feed with a balanced liquid houseplant fertiliser diluted to roughly half strength every 2-4 weeks through spring and summer. Stop or greatly reduce feeding in autumn and winter when growth slows, and never feed dry soil. Treat that as every 2-4 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 eyelash begonia?
Half strength is the safe default for eyelash begonia — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding eyelash begonia 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 eyelash begonia 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 eyelash begonia?
Flush the pot of eyelash begonia 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
- Eyelash Begonia care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water eyelash begonia — 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 569 fertilising guides in the Growli library