Patio plants Tropical Plants

Brugmansias Don’t Like the Cold

By Larry Hodgson

Question: I have a young brugmansia that will be spending its first winter with me. It’s planted in the northeast part of my garden where it ought to be covered with about 3 feet (90 cm) of snow. Should I protect it for the winter and if so, how?

Linette Paquet,
Quebec City

Answer: Sorry to disappoint you, but your brugmansia, also called angel’s trumpet (Brugmansia spp.), with its stunning large, trumpet-shaped flowers, is by no means hardy enough for your climate. You live in USDA hardiness zone 3 (AgCan hardiness zone 4) where winters plunge well below freezing and stay there for weeks, yet the brugmansia is a subtropical plant: even the cold-hardiest cultivars can barely tolerate 23 °F (-5 °C), and even then, only for short periods of time. Even under 3 feet (90 cm) of snow, your plant will have no chance of surviving the winter no matter what protection you offer it.

Gardeners much further south, in hardiness zone 8, sometimes manage to keep a brugmansia alive in a sheltered place by mulching it deeply. It will then die to the ground … but sprout again when warmer weather returns in the spring. Only in hardiness zones 9 to 12—the tropics, essentially—can you expect a brugmansia to grow outdoors on without special winter care.

Indoors or Bust!

If you want to keep your brugmansia alive without having to move to Florida or Costa Rica, you’ll need to bring it indoors for the winter. If so, you have two options.

Treat It Like A Houseplant

If you have a large, brightly lit window, you can keep your brugmansia growing all winter by continuing to water it as needed. Provide good humidity, too, otherwise the plant may lose many of its leaves. It may be necessary to rinse its foliage with water from time to time to prevent spider mites, very common on indoor plants in the winter when the air is dry.

Forced Dormancy

Brugmansia after severe pruning.
To stimulate dormancy, prune your brugmansia severely before bringing it indoors to a cool to cold space. Photo: www.lrgarden.cn

Otherwise, prune your brugmansia severely, cutting its branches back by at least half, thus cutting off all its leaves. Then store it in a cool but frost-free spot (below 50 °F/10 °C, if possible), possibly a basement or garage. It can be in the dark, too, as the plant will be essentially dormant. During winter, water very little, just enough to prevent the soil from drying out completely. 

In March, it will be time to wake your brugmansia up. Move it to a well-lit room and start watering and fertilizing it again. It will be in bloom again by summer.

Garden writer and blogger, author of more than 60 gardening books, the laidback gardener, Larry Hodgson, lives and gardens in Quebec City, Canada. The Laidback Gardener blog offers more than 2,500 articles to passionate home gardeners, always with the goal of demystifying gardening and making it easier for even novice gardeners. If you have a gardening question, enter it in Search: the answer is probably already there!

2 comments on “Brugmansias Don’t Like the Cold

  1. Even where they live outside, they take a break through winter. Mine already finished a few days ago. They bloom later in Los Angles, and may start blooming again so soon after they stop that no one notices that they took a break.

  2. I overwintered one for several years in a garage that hovered between 2-5 C. Let it go this year as tired of fighting spidermite.

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