Jeffersonia dubia

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Herbaceous Perennial
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A deciduous perennial to 20cm tall, forming a compact clump of kidney-shaped, shallowly 2-lobed leaves, with pale violet-blue flowers 2.5cm across opening with the new leaves in early spring

Position

Full shade, Partial shade

Soil Types

Loam

Max Height

0.1-0.5 metres

Max Spread

0-0.1 metre

Size

Time to Maturity
1–2 years
Max Spread
0-0.1 metre
Max Height
0.1-0.5 metres

Growing Conditions

Loam
Moisture
Moist but well–drained
pH
Acid or Alkaline or Neutral

Position

Full shade Partial shade
Aspect
North–facing or East–facing
Exposure
Sheltered
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)
H6

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Berberidaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Bushy
Genus
Jeffersonia are small, clump-forming perennials with2-lobed, kidney-shaped leaves and bowl-shaped white or pale violet flowers in spring
Name Status
Correct
Plant Range
NE Asia

How to Grow

Cultivation

Grow in moist, humus-rich, preferably neutral to acid soil in partial or full shade; top dress with leaf mould or other humus-rich material in autumn. Dislikes disturbance and may take a year or two to settle after transplanting; established plants tolerate drought

Propagation

Propagate by seed in containers in an open frame as soon as ripe or divide established plants in spring

Suggested planting locations and garden types

  • Rock garden
  • Flower borders and beds

Pruning

No pruning required

Pests

May be susceptible to slugs and snails

Diseases

Generally disease-free