• 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

Lathyrus odoratus 'Monty Don'

sweet pea 'Monty Don'

sweet pea 'Monty Don'


  • Other common names sweet pea 'Monty Don'

  • Family Fabaceae

  • Genus Lathyrus can be annuals or herbaceous or evergreen perennials, mostly climbing, with pinnate leaves ending in a tendril, and showy pea-like flowers, fragrant in some species

  • Details

    'Monty Don' is a twining, annual climber to 2m tall with fragrant dark maroon flowers from summer into autumn


  • Foliage Deciduous

  • Habit Climbing

  • Fragrance Flower

  • 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

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

  • Exposure Sheltered


  • Loam


  • Chalk


  • Sand


  • Clay


  • MoistureMoist but well-drained

  • SoilLoam, Chalk, Sand, Clay

  • pHNeutral, Alkaline, Acid


  • Ultimate height 1.5-2.5 metres

  • Ultimate spread 0.1-0.5 metres

  • Time to ultimate height 1-2 years

How to grow

Cultivation Plant out seedlings 20-30cm apart after the final spring frost in well-drained but moisture-retentive humus-rich soil in full sun or very light dappled shade, and provide support. See sweetpea cultivation

Propagation Propagate by seed: in milder areas sow during autumn, and overwinter the young plants in a cold frame or unheated glasshouse, or in colder areas sow in late March or April; plant out after the final spring frost

Suggested planting locations and garden types Flower borders and beds Cut Flowers Hedging & Screens Wall-side Borders Cottage & Informal Garden City & Courtyard Gardens

How to care

Pruning For a long and regular supply of blooms, cut flowers frequently, before they produce seed pods

Pests May be affected by aphids, slugs and snails

Diseases May be affected by powdery mildews, leafy gall, and sweet pea virus

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