Nicotiana glauca

RHS Plant Profile

tree tobacco

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Other common names

mustard tree

Annual Biennial Shrubs

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A deciduous to semi-evergreen shrub, grown as a tender perennial or shrub within the UK, reaching a height of around 120cm (more in warmer climates) and with an upright habit and thick, rubbery blue-green leaves. Slim, tube-shaped bright yellow flowers appear from August through to October

Position

Full sun

Soil Types

Loam

Max Height

1-1.5 metres

Max Spread

1-1.5 metres

Size

Time to Maturity: 2–5 years
Max Spread: 1-1.5 metres
Max Height: 1-1.5 metres

Growing Conditions

Loam

Moisture: 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): H3

Colour & Scent

Fragrance Flower

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Solanaceae
Native to GB/Ireland: No
Foliage: Deciduous, Semi evergreen
Habit: Columnar upright
Potentially harmful: Harmful if eaten; avoid skin contact. Wear gloves and other protective equipment when handling. Pets (dogs): Harmful if eaten; avoid skin contact. For further information and contact numbers regarding pets, see the HTA guide to potentially harmful plants
Genus: Nicotiana can be annuals, biennials, perennials or shrubs, with simple, alternate leaves and tubular or salver-shaped, often fragrant flowers borne in racemes or panicles in summer or autumn
Name Status: Correct

How to Grow

Cultivation

Grow in a warm, sunny location in well-drained soil. Prefers poor, sandy or stony soils

Propagation

Propagate by seed in early spring, or propagate by softwood cuttings in spring and summer. Will self-seed freely and may become a nuisance if not managed well

Suggested planting locations and garden types

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

Pruning

No pruning required, but can be trimmed in late winter to early spring to remove dead branches and promote bushy growth. It also tolerates hard pruning for renovation, if required

Pests

May be susceptible to aphids, Thrips, glasshouse whitefly and glasshouse leafhopper

Diseases

May be susceptible to grey moulds and to virus diseases