Fertilising guide
How to fertilise Common Angel's Trumpet (Brugmansia arborea)— schedule & NPK
Also called Common Angel's Trumpet, Maikoa, Tree Datura.
More about common angel's trumpet
About Common Angel's Trumpet
Brugmansia arborea · also called Common Angel's Trumpet, Maikoa · flowering
Brugmansia arborea is a large, fast-growing shrub or small tree from the Andes producing pendulous white trumpet flowers with an intense evening fragrance. All parts are severely toxic to humans and animals. Best grown outdoors in frost-free climates or as a container specimen overwintered indoors. Provides a dramatic tropical focal point.
Growth habit: Large multi-stemmed deciduous to semi-evergreen shrub or small tree
Watch for — Failure to flower: Brugmansia arborea flowers only on mature wood above the first Y-shaped fork — avoid hard pruning of all new growth and ensure the plant receives adequate phosphorus and potassium in its feed.
What fertiliser common angel's trumpet actually wants — and why
Common Angel's Trumpet 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 common angel's trumpet: 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 common angel's trumpet, 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 common angel's trumpet:
Feed every 1–2 weeks during the growing season with a high-potassium liquid fertiliser (tomato-type) to encourage prolific flowering. In early spring, use a balanced NPK fertiliser to kick-start growth. Stop feeding entirely from mid-autumn through winter. Treat that as sparingly through the growing season 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 common angel's trumpet 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 common angel's trumpet
Half strength is the safe default for common angel's trumpet — 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 common angel's trumpet first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the common angel's trumpet watering schedule.
Signs you are over-feeding common angel's trumpet
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for common angel's trumpet:
- 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 common angel's trumpet
- 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 common angel's trumpet care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of common angel's trumpet 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 common angel's trumpet
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 common angel's trumpet — frequently asked questions
What fertiliser does common angel's trumpet 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. Common Angel's Trumpet 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 common angel's trumpet?
Feed every 1–2 weeks during the growing season with a high-potassium liquid fertiliser (tomato-type) to encourage prolific flowering. In early spring, use a balanced NPK fertiliser to kick-start growth. Stop feeding entirely from mid-autumn through winter. Feed every 1–2 weeks during the growing season with a high-potassium liquid fertiliser (tomato-type) to encourage prolific flowering. In early spring, use a balanced NPK fertiliser to kick-start growth. Stop feeding entirely from mid-autumn through winter. Treat that as sparingly through the growing season 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 common angel's trumpet?
Half strength is the safe default for common angel's trumpet — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding common angel's trumpet 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 common angel's trumpet 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 common angel's trumpet?
Flush the pot of common angel's trumpet 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
- Common Angel's Trumpet care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water common angel's trumpet — 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 hatfieldii yew
- How to fertilise repandens yew
- How to fertilise fastigiata yew
- All 6887 fertilising guides in the Growli library