• AGM plants

    AGM plants have been through a rigorous trial and assessment programme. They are:

    • Excellent for ordinary use in appropriate conditions
    • Available to buy
    • Of good constitution
    • Essentially stable in form & colour
    • Reasonably resistant to pests & diseases

Mentha pulegium 'Upright'

pennyroyal 'Upright'

  • Other common names pennyroyal 'Upright'
    upright pennyroyal

  • Family Lamiaceae

  • Genus Mentha are aromatic, rhizomatous perennials with opposite, toothed leaves and small tubular flowers in spikes of whorls in summer

  • Details 'Upright' is a herbaceous perennial 30cm or more high with mostly upright stems and some prostrate spreading stems, narrowly elliptic to rounded, sharply aromatic, slightly toothed, bright green leaves, to 3cm long, and whorled spikes of lilac flowers in summer; the leaves can be used as a culinary and medicinal herb, but should not be taken by pregnant women; it also acts as an insect repellent


  • Foliage Deciduous

  • Habit Clump-forming

  • Fragrance Leaf

  • 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)




  • Full Sun

  • Partial Shade

  • Aspect South-facing or West-facing or East-facing or North-facing

  • Exposure Sheltered or Exposed


  • Sand


  • Loam


  • Clay


  • MoistureMoist but well-drained, Poorly-drained

  • SoilSand, Loam, Clay

  • pHAcid, Neutral


  • Ultimate height 0.1-0.5 metres

  • Ultimate spread 0.1-0.5 metres

  • Time to ultimate height 2-5 years

How to grow

Cultivation Grow in sun or partial shade in rich, moist, and preferably sandy, acidic soil

Propagation Propagate by division in spring or autumn, or by softwood cuttings, which will root at the nodes if placed in moist compost or water, during the growing season; it may be short-lived, so it is helpful to propagate reserve plants every year

Suggested planting locations and garden types Flower borders and beds Underplanting of Roses and Shrubs Banks and Slopes Wildlife Gardens Cottage & Informal Garden City & Courtyard Gardens Mediterranean Climate Plants

How to care

Pruning No pruning required

Pests May be affected by caterpillars, leafhoppers, and mint beetle

Diseases May be affected by mint rust

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