Plant care
Angel's Trumpettemperature & humidity
Brugmansia suaveolens
More about angel's trumpet
Ideal temperature for angel's trumpet
Aim for 15-30C ideal; keep above 7-10C (60-86F ideal; keep above 45-50F) on the thermostat and you've handled the easy part. The hard part is the half-metre around the plant: window glass that drops to near-freezing on a January night, a radiator pumping out hot dry air, a draught from an opened front door. Move the plant 30 cm and you've usually fixed the problem. Below roughly 15°C growth pauses; cold beyond that pushes it into dormancy rather than killing it outright.
Cold tolerance & winter care
Angel's Trumpet is comparatively hardy (USDA 9-11 (root-hardy to ~7b-8 with heavy mulch/protection; grown as a container or overwintered plant elsewhere), RHS undefined). Within that range it tolerates a cold dormant spell outdoors; outside it, grow it in a container you can move under cover or overwinter in a cool but frost-free spot. Hardiness assumes an established plant in well-drained soil — a wet, cold root zone kills far more plants than cold air alone.
Humidity for angel's trumpet
Angel's Trumpet sits happiest at around Moderate to high (50%+) relative humidity. As a tropical plant it appreciates ample humidity. Outdoors in summer this is rarely an issue; indoors over winter, dry air encourages spider mites, so a pebble tray or grouped plants help. The usual low-humidity tell is crisp brown leaf tips and edges while the soil moisture is fine — a sign the air, not the watering, is the problem. If you need to raise it, the reliable methods are grouping plants together, standing the pot on a tray of damp pebbles (the pot above the waterline, never in it), or running a small humidifier in winter when indoor heating dries the air most. Misting is the least effective — it raises humidity for minutes, not hours.
Angel's Trumpet temperature & humidity — frequently asked questions
What temperature is best for angel's trumpet?
Angel's Trumpet grows best between 15-30C ideal; keep above 7-10C (60-86F ideal; keep above 45-50F). Keep it out of cold draughts, off freezing windowsills in winter, and away from the hot dry air directly above radiators — the extremes matter far more than the average room temperature.
How cold can angel's trumpet tolerate?
Angel's Trumpet starts to suffer below roughly 15°C. It tolerates a cold dormant period within USDA 9-11 (root-hardy to ~7b-8 with heavy mulch/protection; grown as a container or overwintered plant elsewhere), but a wet cold root zone is more dangerous than cold air.
What humidity does angel's trumpet need?
Angel's Trumpet prefers about Moderate to high (50%+) relative humidity. As a tropical plant it appreciates ample humidity. Outdoors in summer this is rarely an issue; indoors over winter, dry air encourages spider mites, so a pebble tray or grouped plants help.
How do I raise humidity for angel's trumpet?
Group it with other plants, stand the pot on a tray of damp pebbles (kept above the waterline), or run a small humidifier in winter. Misting only helps for a few minutes, so it is the weakest option for a plant that genuinely needs more humidity.
Can angel's trumpet live outside?
Angel's Trumpet is rated for USDA zone 9-11 (root-hardy to ~7b-8 with heavy mulch/protection; grown as a container or overwintered plant elsewhere). Within that range it can stay outdoors; outside it, grow it in a moveable container and protect the roots from a wet, cold winter.
More angel's trumpet care
In the UK? Keeping angel's trumpet warm in a UK home covers the radiator, single-glazing and heating-season humidity angle. Temperature and humidity are one piece. See the full angel's trumpet care guide, its cold-hardiness guide, and watering schedule — humidity and watering problems are easy to confuse.