Repotting guide

When & how to repot Common Angel's Trumpet (Brugmansia arborea)

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.

Mature size: 3–5 m tall, 2–3 m wide (container plants typically 1.5–2.5 m)

Watch for — Wilting despite moist soil: Usually indicates root rot from poor drainage or fungal Phytophthora infection — check roots for brown, mushy tissue and improve drainage immediately; in severe cases, take healthy cuttings to restart the plant.

How to tell common angel's trumpet needs repotting

Repotting on a calendar is less reliable than reading the plant. For common angel's trumpet, watch for these signs:

Thick roots out of the drainage holes, or circling the surface and lifting the plant.
The pot dries out unusually fast and common angel's trumpet wilts between waterings it used to shrug off.
The plant is visibly top-heavy and tips over easily.
Stalled growth and small new leaves over a full season — though with a big specimen, top-dressing is often the better first response before a full repot.

For the underlying biology of a pot-bound root system and why it stalls a plant, see our guide to spotting and fixing a root-bound plant.

How often to repot common angel's trumpet

Every 2–3 years; top-dress in the in-between years. Common Angel's Trumpet's growth habit — large multi-stemmed deciduous to semi-evergreen shrub or small tree — sets the pace. 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.

What size pot to step common angel's trumpet up to

Move up exactly one pot size. A heavy common angel's trumpet dropped into a vastly bigger pot sits in a reservoir of wet soil its roots cannot reach, which rots them and destabilises the plant. In the years between repots, lift off and replace the top 3–5 cm of soil (top-dressing) instead — it refreshes nutrients without the shock of a full repot.

Not sure of the exact diameter? Our pot size calculator takes the current pot and root spread and tells you the right next size — it deliberately recommends a single step up, never a big jump.

The best time of year to repot common angel's trumpet

Early spring, just as new growth restarts, is the ideal window for common angel's trumpet. The plant is moving into its strongest growth phase and re-roots into fresh soil quickly. Avoid repotting in winter dormancy or, for flowering plants, while it is in bud or bloom — recovery is slowest then and you risk dropping the flowers.

Step-by-step: repotting common angel's trumpet

Consider top-dressing first. If common angel's trumpet is not badly root-bound, scrape off and replace the top 3–5 cm of soil instead — far less shock for a big plant that hates moving.
Get help and one size up. For a full repot, choose a pot just one size larger. A heavy plant needs two people and a stable, free-draining pot.
Ease it out on its side. Lay the plant down, slide the pot off, and gently loosen the outer roots. Do not bare-root a mature specimen.
Repot at the same depth. Add fresh rich, fertile, moisture-retentive but well-draining loam beneath and around the rootball, keeping the original soil line. Firm it so the trunk is stable and upright.
Water and leave it put. Water thoroughly, then leave common angel's trumpet in the same spot and light — moving and repotting at once is what makes it drop leaves.

Aftercare

Leave common angel's trumpet in exactly the same spot and light it was in before — moving and repotting at the same time is what makes a big specimen drop leaves. Water it in well, then let the top of the soil dry before watering again so the larger volume of fresh soil does not stay sodden. Do not fertilise for about 4 weeks — fresh mix already carries nutrients and feeding freshly disturbed roots scorches them.

The right soil mix for common angel's trumpet

Common Angel's Trumpet wants rich, fertile, moisture-retentive but well-draining loam. A nutrient-rich loamy compost amended with perlite (3:1) works well in containers. In the ground, improve heavy clay soils with organic matter. Slightly acidic to neutral pH (6.0–7.0) is ideal. Repot container plants every 1–2 years as roots fill the pot. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting common angel's trumpet — frequently asked questions

How often should you repot common angel's trumpet?

Every 2–3 years; top-dress in the in-between years for common angel's trumpet. Fully repot common angel's trumpet only every 2–3 years; in the in-between years just top-dress the top 3–5 cm of soil. Step up one pot size in spring with rich, fertile, moisture-retentive but well-draining loam. It is heavy and hates being moved, and a vastly oversized pot holds water against the roots and rots them.

What size pot does common angel's trumpet need?

When is the best time of year to repot common angel's trumpet?

Should you top-dress or fully repot common angel's trumpet?

For a big, heavy common angel's trumpet, top-dressing — replacing the top 3–5 cm of soil — is the gentler option most years, with a full repot only every 2–3 years. A mature specimen sulks and drops leaves when fully repotted, so do it as rarely as the roots allow.

Should you fertilise common angel's trumpet after repotting?

Not immediately. Wait about 4 weeks after repotting common angel's trumpet. Fresh mix already contains nutrients, and feeding freshly cut or disturbed roots burns them. Resume your normal feeding routine once you see new growth.