Baptisia australis

RHS Plant Profile
blue false indigo

Save a plant

Where do you want to save Baptisia australis?

Plants I own
Wishlist
Go to My Plants
blue false indigo RHS
blue false indigo RHS 2001
blue false indigo visionspictures.com

Other common names

bastard lupine, false indigo, false lupine, golden indigo, indigo weed, tall false indigo

Synonyms

Baptisia caerulea, Baptisia confusa, Baptisia minor, Baptisia versicolor

Award of Garden Merit
Herbaceous Perennial
Thank you - your purchase supports our charity work Buy this from RHS Plants Shop
Buy online from £10.99Buy this from Plant Nurseries
42 Suppliers

A clump-forming, herbaceous perennial to aroubd 1.2m in height, with grey-green, trifoliate leaves. Upright, lupin-like racemes of violet-blue flowers are followed by inflated, dark grey seed pods

Position

Full sun

Soil Types

Loam, Sand

Max Height

1-1.5 metres

Max Spread

0.5-1 metres

Size

Time to Maturity
2–5 years
Max Spread
0.5-1 metres
Max Height
1-1.5 metres

Growing Conditions

Loam Sand
Moisture
Well–drained
pH
Acid or Neutral

Position

Full sun
Aspect
South–facing or West–facing or East–facing
Exposure
Exposed
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)
H7
Drought Resistance
Yes

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Fabaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Clump forming
Genus
Baptisia are perennials with branched stems bearing three-parted leaves and terminal or axillary racemes of pea flowers, followed by conspicuous inflated pods
Name Status
Correct
Plant Range
C & E USA

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

  • Cottage and informal garden
  • Prairie planting
  • Wildlife gardens
  • Flower borders and beds
  • Banks and slopes
  • Cut flowers

Pruning

Cut down once foliage has blackened

Pests

Generally pest-free

Diseases

Generally disease-free