• 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

Mirabilis jalapa

marvel of Peru

  • Other common names marvel of Peru
    four o'clock flower

    false jalap
    four o'clock plant
    garden jalap
    jalap plant
    marvel of the world
    pretty-by-night
    Japanese wonder flower
    pearl of Egypt

    see more
  • Family Nyctaginaceae

  • Genus Mirabilis can be annuals or tuberous perennials, with paired, ovate leaves and trumpet-shaped flowers in clusters in the leaf axils

  • Details M. jalapa is a bushy, tuberous perennial often grown as an annual, with fragrant flowers opening in the afternoon, in a wide range of colours, and sometimes bicoloured

  • Plant range Peru trop. America

Characteristics

  • Foliage Deciduous

  • Habit Bushy

  • Fragrance Flower

  • Toxicity Ingestion may cause severe discomfort

  • 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)

    H3

Colour

Sunlight

  • Full Sun

  • Aspect South-facing

  • Exposure Sheltered

Soil

  • Sand

    Sand

  • Loam

    Loam

  • Chalk

    Chalk

  • MoistureWell-drained

  • SoilSand, Loam, Chalk

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height 0.5-1 metres

  • Ultimate spread 0.5-1 metres

  • Time to ultimate height 2-5 years

How to grow

Cultivation Grow in moderately fertile, moist but well-drained soil in full sun. Shelter from cold, drying winds and provide a dry mulch in winter to protect from excessive winter wet. Alternatively, grow in a container and keep outside over the summer and overwinter

Propagation Propagate by seed in early spring, germinate at 13-18°C. Propagate by division of tubers in spring

Suggested planting locations and garden types Flower borders and beds Patio & Container Plants

How to care

Pruning Cut back prior to lifting tubers

Pests May be attacked by aphids and slugs

Diseases Generally disease free

Did you find the information you were looking for?

RHS members can get exclusive individual advice from the RHS Gardening Advice team.

Join the RHS now

Get involved

We're a UK charity established to share the best in gardening. We want to enrich everyone's life through plants, and make the UK a greener and more beautiful place.