Brugmansia arborea 'Knightii'

RHS Plant Profile

angel's trumpet 'Knightii'

RHS 2002

Synonyms

Brugmansia 'Knightii'
Brugmansia × candida 'Plena'
Brugmansia arborea 'Knightii'

Conservatory Greenhouse Shrubs

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An evergreen shrub or small tree to 4m in height or more, with large elliptic leaves and pendulous, fragrant, hose-in-hose double, white flowers to 30cm in length

Position

Full sun

Soil Types

Chalk, Clay, Loam, Sand

Max Height

2.5-4 metres

Max Spread

1.5-2.5 metres

Size

Time to Maturity: 10–20 years
Max Spread: 1.5-2.5 metres
Max Height: 2.5-4 metres

Growing Conditions

Chalk Clay Loam Sand

Moisture: Moist but well–drained
pH: Acid or Alkaline or Neutral

Position

Full sun

Aspect: South–facing or West–facing
Exposure: Sheltered
Hardiness

Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

H1A: under glass all year (>15C)
H1B: can be grown outside in the summer (10 - 15)
H1C: can be grown outside in the summer (5 - 10)
H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
H4: hardy through most of the UK (-10 to -5)
H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
H6: hardy in all of UK and northern Europe (-20 to -15)
H7: hardy in the severest European continental climates (< -20): H1C
Drought Resistance: Yes

Colour & Scent

Fragrance Flower

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Solanaceae
Native to GB/Ireland: No
Foliage: Evergreen
Habit: Bushy
Potentially harmful: TOXIC if eatenskin irritantavoid eye contact. Wear gloves and other protective equipment when handling TOXIC to pets - see the HTA guide to potentially harmful plants for further information and useful contact numbers
Genus: Brugmansia are large evergreen shrubs with simple, ovate leaves and large, solitary, pendent trumpet-shaped or tubular flowers which are often fragrant
Name Status: Accepted

How to Grow

Cultivation

Under glass, grow in peat-free, loam-based potting compost in full light. Water freely while in active growth and apply a balanced liquid fertiliser every 2 weeks. Keep barely moist in winter. Maintain a minimum winter temperature of about 5°C; the plants will lose their leaves but these will regrow in spring. Plants may be moved outdoors to a position in light, dappled shade in summer. See brugmansia cultivation for further information

Propagation

Propagate by seed or semi-hardwood cuttings

Suggested planting locations and garden types

City and courtyard gardens
Cottage and informal garden
Patio and container plants
Flower borders and beds

Pruning

Pruning group 9, or pruning group 7 if needed

Pests

May be susceptible to glasshouse red spider mite, glasshouse whitefly, thrips and mealybugs under glass

Diseases

Generally disease-free