Thalictrum Nimbus White ('Tntnw') (Nimbus Series)

RHS Plant Profile
meadow rue [Nimbus White]

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Synonyms

Thalictrum 'Tntnw'

Herbaceous Perennial
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A deciduous clump-forming perennial with upright dark green to bronze stems and leaves divided into numerous oblong to ovate, blue-green leaflets. Panicles of small, white flowers are displayed in summer.

Position

Partial shade

Soil Types

Loam, Clay

Max Height

0.5-1 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
2–5 years
Max Spread
0.1-0.5 metres
Max Height
0.5-1 metres

Growing Conditions

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

Position

Partial shade
Aspect
East–facing or West–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)
H5

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Ranunculaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Clump forming
Genus
Thalictrum can be rhizomatous or tuberous perennials with ternately or pinnately divided, often attractive foliage, and panicles or racemes of small flowers with showy stamens and sometimes large colourful petal-like sepals
Name Status
Trade

How to Grow

Cultivation

Grow in moist, humus-rich, neutral to acid soil in partial shade. Water regularly in dry periods. Typically requires staking.

Propagation

Propagate by division

Suggested planting locations and garden types

  • Cottage and informal garden
  • Low Maintenance
  • Flower borders and beds

Pruning

Faded flower stems can be cut back in late autumn or in spring before new growth starts emerging.

Pests

Generally pest-free

Diseases

May be susceptible to Powdery mildews