• 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

Ipomoea lobata

Spanish flag

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
Spanish flag

© RHS

  • Other common names Spanish flag

  • Synonyms Ipomoea versicolor
    Mina lobata

  • Family Convolvulaceae

  • Genus Ipomoea can be annuals or perennials, often twining, or evergreen shrubs, with simple, lobed or dissected leaves and tubular or funnel-shaped flowers which may be solitary or borne in racemes or panicles

  • Details I. lobata is a twining climber up to 5m tall, usually grown as an annual, with three-lobed leaves. The crimson-flushed stems bear one-sided racemes of small, tubular, dark red flowers which fade to orange and then a creamy yellow in summer

  • Plant range Mexico

Characteristics

  • Foliage Deciduous

  • Habit Climbing

  • Toxicity Seeds are highly toxic if ingested

  • 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)

    H1C

Colour

Sunlight

  • Full Sun

  • Aspect South-facing or West-facing

  • Exposure Sheltered

Soil

  • Sand

    Sand

  • Chalk

    Chalk

  • Loam

    Loam

  • MoistureMoist but well-drained

  • SoilSand, Chalk, Loam

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height 4-8 metres

  • Ultimate spread 0.5-1 metres

  • Time to ultimate height 1-2 years

How to grow

Cultivation Grow as an annual climber in a moist but well-drained soil in full sun and sheltered from cold winds

Propagation Propagate by seed

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

How to care

Pruning None required

Pests May be affected by glasshouse red spider mite

Diseases Generally trouble free

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