• 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

Hosta plantaginea var. japonica

Japanese fragrant plantain lily

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
Japanese fragrant plantain lily

© � RHS

  • Other common names Japanese fragrant plantain lily

  • Genus Hosta are clump-forming herbaceous perennials with simple, ovate or lance-shaped leaves, often attractively coloured or variegated, and erect racemes of nodding, funnel or bell-shaped flowers in early summer

  • Family Asparagaceae / Asparagaceae

  • Details H. plantaginea var. japonica is an herbaceous perennial with shining, light green, wavy-edged, ovate or heart-shaped leaves to 25cm long, and fragrant, pure white long-tubed flowers on stems to 60cm tall in late summer

  • Plant range China

Characteristics

  • Foliage Deciduous

  • Habit Bushy

  • 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)
    Old hardiness ratings

    While we update our systems with the new hardiness ratings you may still see old hardiness ratings in your search results. These are denoted as 'Old'.

    • H1 - Requires heated glass
    • H2 - Requires unheated glass
    • H3 - Hardy outside in some regions of the UK
    • H4 - Hardy throughout the UK
    • H1 + H3 - Requires heated glass but may be grown outside in summer

    For full details of the hardiness ratings see

    see more

    H7

Colour

Sunlight

  • Partial Shade

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

  • Exposure Sheltered

Soil

  • Chalk

    Loam

  • MoistureMoist but well-drained

  • SoilLoam

  • pHNeutral, Acid

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 part shade in a soil enriched with well-rotted manure, garden compost or leaf mould. Avoid waterlooged soils and incorporate a controlled relase fertiliser into soil when planting. Avoid permanent mulches as they encourage slugs and snails

Propagation Propagation is by division in early spring. Seed-raised offspring of species and particularly cultivars will be variable

Suggested planting locations and garden types Flower borders and beds Ground Cover Underplanting of Roses and Shrubs City & Courtyard Gardens Coastal Cottage & Informal Garden

How to care

Pruning None required

Pests Slugs and snails are the main problem, but vine weevils, voles, mice and deer can also be problematic

Diseases Problems with a virus are becoming more common

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