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Shrubs

Prostanthera 'Mint-Ice'

Australian mint bush 'Mint-Ice'

A strong, upright, compact evergreen shrub with oval-shaped, aromatic, variegated green and cream foliage and white flowers which appear from May to June. Suitable for borders or in pots and containers. Although evergreen, it will require some protection from frost

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Ultimate height

1–1.5 metres

Time to ultimate height

5–10 years

Ultimate spread

1–1.5 metres

Chalk

Loam

Sand

Moisture

Moist but well–drained

pH

Acid, Alkaline, Neutral

	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

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)

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 compost in full light. Grow outdoors only in a frost-free environment with moist but well-drained soil in full sun. Prune after flowering; hard pruning may be detrimental

Propagation

Propagate by seed or semi-hardwood cuttings

Suggested planting locations and garden types

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

Pruning

Pruning group 8 after flowering

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

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