Boronia heterophylla 'Ice Charlotte'

RHS Plant Profile

boronia 'Ice Charlotte'

RHS

Conservatory Greenhouse Shrubs

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'Ice Charlotte' is an evergreen shrub with dark green, aromatic, needle-like leaves and small, white, scented, bell-shaped flowers in spring

Position

Full sun, Partial shade

Soil Types

Loam, Sand

Max Height

1-1.5 metres

Max Spread

0.5-1 metres

Size

Time to Maturity: 5–10 years
Max Spread: 0.5-1 metres
Max Height: 1-1.5 metres

Growing Conditions

Loam Sand

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

Position

Full sun Partial shade

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): H2

Colour & Scent

Fragrance Flower Foliage

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Rutaceae
Native to GB/Ireland: No
Foliage: Evergreen
Habit: Bushy
Genus: Boronia are shrubs with evergreen, often aromatic, foliage and cup- or bell-shaped flowers borne singly or in clusters
Name Status: Unresolved

How to Grow

Cultivation

Grow outdoors in sheltered, frost-free areas, in acid or neutral, moist but well-drained preferably sandy soil, in full sun or partial shade. Under glass, grow in lime-free potting compost, in good light but shaded from hot sun, with good ventilation. Feed monthly while in growth with phosphate-free fertiliser. Water sparingly in winter

Propagation

Propagate by semi-ripe cuttings with bottom heat in summer

Suggested planting locations and garden types

City and courtyard gardens
Coastal
Patio and container plants

Pruning

Pruning group 10, after flowering

Pests

Glasshouse red spider mite may be a problem under glass

Diseases

Generally problem free