Fertilising guide
How to fertilise Trailing Abutilon (Abutilon megapotamicum)— schedule & NPK
Also called Trailing Abutilon, Flowering Maple, Brazilian Bell-flower, Chinese Lantern.
More about trailing abutilon
About Trailing Abutilon
Abutilon megapotamicum · also called Trailing Abutilon, Flowering Maple · flowering
Native to southern Brazil, Abutilon megapotamicum is a slender, arching shrub grown for its distinctive pendulous flowers with a bright red calyx and soft yellow petals that dangle like lanterns from late spring through autumn. It thrives in full sun with a sheltered position and moist but well-drained soil, making it ideal for wall training or containers in temperate gardens. The most important care fact is consistent moisture during the growing season — plants wilt quickly if allowed to dry out. Abutilon is not listed as toxic by the ASPCA and is considered non-toxic to cats and dogs.
Growth habit: Lax, arching deciduous or semi-evergreen shrub, often wall-trained or grown in a conservatory.
Watch for — Red spider mite: Dry conditions favour Tetranychus urticae, causing pale stippling on leaves; increase humidity and use predatory mites (Phytoseiulus persimilis) for biological control.
What fertiliser trailing abutilon actually wants — and why
Trailing Abutilon 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 trailing abutilon: 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 trailing abutilon, 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 trailing abutilon:
Apply a balanced liquid fertiliser monthly during the growing season (April–September); switch to a low-nitrogen, high-potassium feed in late summer to harden growth. Treat that as monthly 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 trailing abutilon 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 trailing abutilon
Half strength is the safe default for trailing abutilon — 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 trailing abutilon first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the trailing abutilon watering schedule.
Signs you are over-feeding trailing abutilon
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for trailing abutilon:
- 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 trailing abutilon
- 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 trailing abutilon care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of trailing abutilon 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 trailing abutilon
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 trailing abutilon — frequently asked questions
What fertiliser does trailing abutilon 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. Trailing Abutilon 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 trailing abutilon?
Apply a balanced liquid fertiliser monthly during the growing season (April–September); switch to a low-nitrogen, high-potassium feed in late summer to harden growth. Apply a balanced liquid fertiliser monthly during the growing season (April–September); switch to a low-nitrogen, high-potassium feed in late summer to harden growth. Treat that as monthly 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 trailing abutilon?
Half strength is the safe default for trailing abutilon — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding trailing abutilon 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 trailing abutilon 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 trailing abutilon?
Flush the pot of trailing abutilon 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
- Trailing Abutilon care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water trailing abutilon — 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 jasminum nudiflorum
- How to fertilise ipomoea purpurea
- How to fertilise ipomoea tricolor 'heavenly blue'
- All 10153 fertilising guides in the Growli library