Thalictrum reniforme

RHS Plant Profile

kidney-shaped meadow rue

RHS

Herbaceous Perennial

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An erect, rhizomatous, herbaceous perennial up to 1.8m high, with three-pinnate leaves, up to 20cm long, of broadly ovate, orbicular-ovate, or rhombic-obovate, grey-green leaflets, softly hairy beneath, and panicles 20-30cm long of flowers about 2cm across of long, pointed, pale lilac-pink sepals and creamy stamens and pistils from midsummer to early autumn; honeybees visit Thalictrum flowers for pollen

Position

Partial shade

Soil Types

Chalk, Clay, Loam, Sand

Max Height

1.5-2.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity: 2–5 years
Max Spread: 0.1-0.5 metres
Max Height: 1.5-2.5 metres

Growing Conditions

Chalk Clay Loam Sand

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

Position

Partial shade

Aspect: South–facing or North–facing or West–facing or East–facing
Exposure: Exposed or 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): H7

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Ranunculaceae
Native to GB/Ireland: No
Foliage: Deciduous
Habit: Columnar upright
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: Correct

How to Grow

Cultivation

Grow in moisture-retentive, humus-rich but well-drained soil in full or partial shade, and provide support if necessary, for example by growing among shrubs. See staking perennials for further advice.

Propagation

Propagate by seed, sown in containers in a cold frame as soon as ripe or in early spring, or by division as new growth begins in spring; divisions may be slow to re-establish

Suggested planting locations and garden types

City and courtyard gardens
Cottage and informal garden
Cut flowers
Flower borders and beds

Pruning

No pruning required

Pests

May be susceptible to slugs

Diseases

May be susceptible to powdery mildews in dry conditions