Brugmansias are tender tropical flowers that are sometimes called "Angel's Trumpet." They are small bushes that produce long, pendulous flowers that hang down from the branches. They look similar to datura flowers, but the flowers of datura stand up rather than hang down. The two are not related, but their flowers look similar. Brugmansia must be grown as potted plants in all areas that experience freezing temperatures in winter. They won't flower while being over wintered indoors, but they will burst into bloom once they are brought outdoors in spring.
Grow brugmansia as container plants. They are tender tropical bushes and will die in areas that experience any freezing winter temperatures. If you start with a small brugmansia transplant, pot it up in a 6 to 8 inch pot. Full size bushes will grow in a 14-inch pot that holds several gallons of soil.
Pot up brugmansia in a mix of 2 parts regular indoor potting soil and 1 part each of compost and perlite. Cover the drainage hole with a rock or piece of broken clay pot to keep the soil from washing out of the bottom of the pot.
Water brugmansia plants daily while they are outdoors during hot summer weather. During the winter months, they will need slightly less water, but their soil should not be allowed to dry out.
Prune to shape either as a small tree or a bush. To grow it as a small tree, insert a stake to support the trunk, and prune off all side branches in early spring until the trunk reaches 3 to 4 feet high. After that, allow side and lateral branches to grow and to form the canopy. Continue removing all suckers growing up from the ground around the trunk. To grow it as a bush, remove 1/3 of the oldest branches growing upright from the ground in early spring each year.
Bring brugmansia indoors in early fall, before nighttime temperatures drop into the lower 40s. Put it in a sunny south facing window or under artificial light. Reduce the amount of water because the plant will stop producing flowers during the winter months and will not need to be watered as much.
Move brugmansia outdoors in late spring as soon as nighttime temperatures are reliably in the upper 40s or low 50s. Put it in the shade of a tree for a few days, and gradually move it into a position where it gets sun in the morning and evening but is shaded during the hottest part of the day.
Fertilize brugmansia during the growing season when they are outdoors. Use a fertilizer that is dissolved in water and applied by watering the plant with the fertilizer solution. Use a mixture that is half the manufacturer's recommended rate of application, and apply it weekly during the plant's active growing period. Always apply fertilizer after thoroughly watering the plant with plain water.