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Herbaceous Perennial

Thalictrum isopyroides

Isopyrum-like meadow rue

A diminutive herbaceous species with glaucous, fern-like foliage. Dainty, fluffy panicles of pale yellow flowers are borne in early summer

Synonyms

Thalictrum flavum 'Chollerton'
Thalictrum from Afghanistan

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Ultimate height

0.1–0.5 metres

Time to ultimate height

2–5 years

Ultimate spread

0.1–0.5 metres

Chalk

Loam

Sand

Moisture

Moist but well–drained, Well–drained

pH

Acid, Alkaline, Neutral

	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Full sun
Partial shade

Aspect

East–facing or South–facing or West–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)

Botanical details

Family: Ranunculaceae
Native to GB / Ireland: No
Foliage: Deciduous
Habit: Bushy
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
Plant range: C & SW Asia

How to grow

Cultivation

Prefers sun or semi-shade. Plants can tolerate dry conditions as they grow naturally in rocky areas

Propagation

Propagate by division in spring or propagate by seed. Sow seed as fresh as possible without bottom heat. Germination may take many months

Suggested planting locations and garden types

Cottage and informal garden
Flower borders and beds

Pruning

Tidy up plants in late autumn

Pests

Generally pest-free

Diseases

Generally disease-free

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