Thalictrum delavayi var. mucronatum

RHS Plant Profile

pointed Chinese meadow rue

Herbaceous Perennial

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A clump-forming perennial to 2m tall with leaves divided into oblong to rounded leaflets. Erect, wiry stems bear loose sprays of small, lilac-blue flowers with pointed petals and prominent yellow stamens from summer into autumn

Position

Full sun, Partial shade

Soil Types

Chalk, Clay, Loam

Max Height

1.5-2.5 metres

Max Spread

0.5-1 metres

Size

Time to Maturity: 2–5 years
Max Spread: 0.5-1 metres
Max Height: 1.5-2.5 metres

Growing Conditions

Chalk Clay Loam

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

Position

Full sun Partial shade

Aspect: South–facing or West–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): H5

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Ranunculaceae
Native to GB/Ireland: No
Foliage: Deciduous
Habit: Bushy
Potentially harmful: Contact with foliage may produce a mild skin irritation. Wear gloves and other protective equipment when handling
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 moist, humus-rich soil in partial shade. May require staking. See staking perennials for further advice.

Propagation

Propagate by division or by seed

Suggested planting locations and garden types

Cottage and informal garden
Prairie planting
Flower borders and beds

Pruning

Spent flowers should be removed to prevent over abundance of self sown-seedlings; cut down foliage in late winter or early spring

Pests

Generally pest-free

Diseases

Generally disease-free but may be susceptible to powdery mildews in dry conditions