• 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

Apios americana

cinnamon vine

  • Other common names cinnamon vine
    ground nut

    ground pen
    Indian potato
    mic-mac potato
    North American potato bean
    North American wild bean
    pig potato
    potato bean
    potato pea
    trailing pea
    tuberose wisteria
    tuberous-rooted wisteria
    white apple
    wild bean

    see more
  • Synonyms Apios tuberosa

  • Family Fabaceae

  • Genus Apios are a genus of tender, perennial vine which produce edible beans and tubers. Popular during Victorian times, it produced small, scented racemes of purple coloured flowers.

  • Details A. americana is a slender, herbaceous perennial climber with edible tubers and leaves made up of five or seven, pointed leaflets. The scented flowers, borne in late summer and early autumn are pea-like, pale brown outside and dark, reddish-brown inside

  • Plant range N America


  • 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

  • Partial Shade

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

  • Exposure Exposed or Sheltered


  • Clay


  • Loam


  • Sand


  • MoistureMoist but well-drained

  • SoilClay, Loam, Sand

  • pHAcid, Alkaline, Neutral


  • 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 tubers in moist but well-drained soil in sun or light shade. Will scramble over shrubs, or twine around supports such as bamboo canes

Propagation Separate tubers in autumn and replant

Suggested planting locations and garden types Wall-side Borders City & Courtyard Gardens Cottage & Informal Garden Patio & Container Plants

How to care

Pruning No pruning needed, will die down in autumn

Pests Slugs and snails may be a problem

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

The Royal Horticultural Society is the UK’s leading gardening charity. We aim to enrich everyone’s life through plants, and make the UK a greener and more beautiful place.