How To Care For A Brugmansia Plant. Feed indoor plants every two weeks while the plant is in bloom with a 15-5-10 fertilizer. Fertilizers for Brugmansia are introduced regularly throughout the entire period of intensive growth and flowering with a frequency of 1 time per week.
In colder regions plants that are grown in the ground must be dug up in early fall before the first frost. Keep as much soil around the roots as possible. In the first few months add a bit of plant food.
Another option is to make a spray solution of equal parts water and isopropyl alcohol and spray the plant.
Treating the plant with neem oil. The leaves will wilt when the plant is thirsty. Feed your younger plants with a water-soluble fertilizer at least once a week especially during their flowering season. In the first few months add a bit of plant food.