• 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

Baptisia australis

false indigo

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
false indigo

© � RHS 2001

  • Other common names false indigo
    bastard lupine

    blue false indigo
    false lupine
    golden indigo
    indigo weed
    tall false indigo

    see more
  • Synonyms Baptisia caerulea
    Baptisia confusa

    Baptisia minor
    Baptisia versicolor

    see more
  • Genus Baptisia are perennials with branched stems bearing three-parted leaves and terminal or axillary racemes of pea flowers, followed by conspicuous inflated pods

  • Family Papilionaceae / Papilionaceae

  • Details B. australis is an herbaceous perennial forming a clump to 1.2m, with grey-green, trifoliate leaves and erect, lupin-like racemes of violet-blue flowers, followed by inflated, dark grey pods

  • Plant range E USA

Characteristics

  • Foliage Deciduous

  • Habit Clump-forming

  • 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

  • Full Sun

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

  • Exposure Exposed

Soil

  • Chalk

    Loam

  • Chalk

    Sand

  • MoistureWell-drained

  • SoilLoam, Sand

  • pHAcid, Neutral

Size

  • Ultimate height

    1-1.5 metres

  • Ultimate spread

    0.5-1 metres

  • Time to ultimate height

    2-5 years

How to grow

Cultivation Grow in open, porous, preferably sandy soil in full sun; drought resistant once roots have penetrated the soil. Best left undisturbed, although vigorous clumps may be carefully divided in spring.

Propagation Propagate by seed sown in pots in a cold frame as soon as seed is ripe or propagate by division in early spring

Suggested planting locations and garden types Flower borders and beds Low Maintenance Cut Flowers Banks and Slopes Drought Resistant Cottage & Informal Garden Wildlife Gardens Prairie Planting

How to care

Pruning Cut down once foliage has blackened

Pests Generally pest free

Diseases Generally disease free

Advertise here

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