Fertilising guide
How to fertilise Round-leafed Stephania (Stephania rotunda)— schedule & NPK
Also called Round-leafed Stephania.
More about round-leafed stephania
About Round-leafed Stephania
Stephania rotunda · also called Round-leafed Stephania · houseplant
Stephania rotunda is a large-caudex vine from Southeast Asian forests, prized in cultivation for its prominent peltate, rounded leaves and impressive tuberous base. A collector's specimen requiring warmth, moderate humidity during growth, and a completely dry winter dormancy. Not for beginners, but rewarding for patient growers.
Growth habit: Deciduous caudiciform climber; large rounded caudex (tuber) is partially above ground; produces vigorous twining vines with large, distinctly rounded peltate leaves in the growing season.
What fertiliser round-leafed stephania actually wants — and why
Round-leafed Stephania 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 round-leafed stephania: 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 round-leafed stephania, 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 round-leafed stephania:
Apply a balanced liquid fertiliser (e.g. 10-10-10 NPK) at half strength every 2 weeks throughout active growth. Switch to a low-nitrogen fertiliser in late summer to encourage the plant to store energy back into the caudex before dormancy. Do not feed dormant plants. 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 round-leafed stephania 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 round-leafed stephania
Half strength is the safe default for round-leafed stephania — 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 round-leafed stephania first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the round-leafed stephania watering schedule.
Signs you are over-feeding round-leafed stephania
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for round-leafed stephania:
- 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 round-leafed stephania
- 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 round-leafed stephania care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of round-leafed stephania 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 round-leafed stephania
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 round-leafed stephania — frequently asked questions
What fertiliser does round-leafed stephania 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. Round-leafed Stephania 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 round-leafed stephania?
Apply a balanced liquid fertiliser (e.g. 10-10-10 NPK) at half strength every 2 weeks throughout active growth. Switch to a low-nitrogen fertiliser in late summer to encourage the plant to store energy back into the caudex before dormancy. Do not feed dormant plants. Apply a balanced liquid fertiliser (e.g. 10-10-10 NPK) at half strength every 2 weeks throughout active growth. Switch to a low-nitrogen fertiliser in late summer to encourage the plant to store energy back into the caudex before dormancy. Do not feed dormant plants. 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 round-leafed stephania?
Half strength is the safe default for round-leafed stephania — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding round-leafed stephania 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 round-leafed stephania 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 round-leafed stephania?
Flush the pot of round-leafed stephania 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
- Round-leafed Stephania care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water round-leafed stephania — 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 shaggy shield fern
- How to fertilise leatherleaf fern
- How to fertilise table fern
- All 8452 fertilising guides in the Growli library