Eutrochium maculatum Atropurpureum Group

RHS Plant Profile

eupatorium Atropurpureum Group

RHS 2002

Other common names

Joe-pye weed 'Atropurpureum'

Synonyms

Eupatorium purpureum subsp. maculatum 'Atropurpureum'
Eupatorium maculatum 'Atropurpureum'
Eupatorium maculatum Atropurpureum Group
Eupatorium purpureum 'Atropurpureum'
Eupatorium fistulosum 'Atropurpureum'
Eupatorium purpureum var. atropurpureum
Eupatorium atropurpureum misapplied

Herbaceous Perennial Bogs

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A robust herbaceous group of perennials, to 2m in height, with whorled, oval leaves and erect purplish stems bearing flat, terminal clusters of small, tubular, deep rose-purple flowers in mid and late summer

Position

Full sun, Partial shade

Soil Types

Chalk, Clay, Loam, Sand

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 Sand

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

Position

Full sun Partial shade

Aspect: West–facing or East–facing or South–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: A small genus of five flowering herbaceous perennial species native to North America. Erect, stout stems carry lance-shaped leaves and terminal large, fluffy clusters of many small, pink, sometimes white flowers
Name Status: Accepted

How to Grow

Cultivation

Grow in any moist soil in full sun or partial shade

Propagation

Propagate by seed sown in containers in spring or autumn, or by division in spring

Suggested planting locations and garden types

Prairie planting
Cottage and informal garden
Wildlife gardens
Flower borders and beds

Pruning

Cut back at the end of the season

Pests

Generally pest-free

Diseases

Generally disease-free