Prostanthera rotundifolia 'Rosea'

RHS Plant Profile

pink round-leaf mintbush

RHS

Synonyms

Prostanthera rotundifolia 'Chelsea Pink'
Prostanthera 'Chelsea Pink'
Prostanthera rotundifolia 'Chelsea Girl'

Shrubs

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'Rosea' is a bushy evergreen shrub to 2m or more, with small, ovate, strongly mint-scented leaves and profusely-borne 2-lipped, pale rose pink flowers with a darker eye, through a long flowering season in late spring and early summer

Position

Full sun

Soil Types

Chalk, Loam, Sand

Max Height

1.5-2.5 metres

Max Spread

1-1.5 metres

Size

Time to Maturity: 5–10 years
Max Spread: 1-1.5 metres
Max Height: 1.5-2.5 metres

Growing Conditions

Chalk Loam Sand

Moisture: Moist but well–drained or 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): H2
Drought Resistance: Yes

Colour & Scent

Fragrance Foliage

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Lamiaceae
Native to GB/Ireland: No
Foliage: Evergreen
Habit: Bushy
Genus: Prostanthera are bushy evergreen shrubs with small, dark green, highly aromatic leaves and terminal panicles or racemes of cup-shaped white blue or purple flowers in late spring or early summer
Name Status: Accepted

How to Grow

Cultivation

Grow under glass in a peat-free, loam-based potting compost in full light, water sparingly in winter and place outdoors during the summer months. Grow outdoors only in a frost-free environment with moist but well-drained soil in full sun

Propagation

Propagate by seed or semi-hardwood cuttings

Suggested planting locations and garden types

Patio and container plants
Mediterranean climate plants
City and courtyard gardens
Coastal
Cottage and informal garden
Flower borders and beds
Wall side borders

Pruning

Pruning group 8 after flowering; resents hard pruning

Pests

May be susceptible to glasshouse red spider mite and glasshouse whitefly

Diseases

May be susceptible to honey fungus in gardens where it is present but insufficient data to determine degree of susceptibility