Eupatorium cannabinum f. cannabinum 'Flore Pleno' (d)

RHS Plant Profile

double-flowered hemp agrimony

Synonyms

Eupatorium cannabinum 'Plenum', Eupatorium cannabinum var. flore-pleno, Eupatorium cannabinum var. ligulosum, Eupatorium cannabinum var. pleniflorum, Eupatorium cannabinum var. plenum

Herbaceous Perennial

Buy this from Plant Nurseries
10 Suppliers

Robust, upright perennial about 1.5m tall, forming a large dense clump of reddish stems. Masses of long-lasting, double pink flowers in dense panicles are held above palmately-lobed, red-tinted, mid to dark green leaves from summer to early autumn

Position

Full sun, Partial shade

Soil Types

Clay, Loam

Max Height

1-1.5 metres

Max Spread

1-1.5 metres

Size

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

Growing Conditions

Clay Loam

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

Position

Full sun Partial shade

Aspect: East–facing or South–facing or North–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): H7

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Asteraceae
Native to GB/Ireland: No
Foliage: Deciduous
Habit: Clump forming
Genus: Eupatorium can be annuals, herbaceous perennials, subshrubs or evergreen shrubs, with small tubular flowers borne in terminal panicles or corymbs
Name Status: Accepted

How to Grow

Cultivation

Grow in any moist soil in full sun or partial shade

Propagation

Propagate by division in spring

Suggested planting locations and garden types

Cottage and informal garden
Wildlife gardens
Wildflower meadow
Flower borders and beds

Pruning

Cut back spent flowers at the end of the flowering season

Pests

May be susceptible to slugs and aphids

Diseases

Generally disease-free