Mentha cervina alba

RHS Plant Profile

white hart's pennyroyal

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Synonyms

Preslia cervina 'Alba'

Herbaceous Perennial Herbs - Culinary

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An attractive, creeping, herbaceous perennial, perfectly suited to wet ground or in water, with narrow, lance-shaped, aromatic, green leaves and small white flowers that appear in tight whorls in summer. Leaves and flowers are edible and fantastic for pollinators

Position

Full sun, Partial shade

Soil Types

Chalk, Loam, Sand

Max Height

0.1-0.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity: 1–2 years
Max Spread: 0.1-0.5 metres
Max Height: 0.1-0.5 metres

Growing Conditions

Chalk Loam Sand

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

Position

Full sun Partial shade

Aspect: East–facing or North–facing or South–facing or West–facing
Exposure: Exposed or 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): H5

Colour & Scent

Fragrance Foliage

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Lamiaceae
Native to GB/Ireland: No
Foliage: Deciduous
Habit: Spreading branched, Columnar upright
Genus: Mentha are aromatic, rhizomatous perennials with opposite, toothed leaves and small tubular flowers in spikes of whorls in summer
Name Status: Unresolved

How to Grow

Cultivation

Grow in moist but well drained soil in full or partial sun. May have to potential to become a nuisance; plant in a well chosen site where it can grow unrestricted. See mint cultivation for more information

Propagation

Propagate by division in autumn

Suggested planting locations and garden types

Wildlife gardens

Pruning

Cut back after flowering in autumn

Pests

May be susceptible to caterpillars and leafhoppers

Diseases

May be susceptible to mint rust and powdery mildews