Eutrochium purpureum

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gravel root

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Other common names

grass root, gravel weed, hardy ageratum, Indian gravel root, Indian sage, Indian sanicle, Joe Pye weed, kidney root, kidney wort, marsh milkweed, motherwort, pride of the meadow, purple boneset, purple hemp agrimony, queen of the meadow, queen of the prairie, quill wort, sisters of healing, skunkweed, sweet-scented joe-pyeweed, trumpet weed

Synonyms

Eupatorium purpureum

Herbaceous Perennial
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A clump-forming perennial with lance-shaped, sometimes purple-tinged leaves to 25cm long, and domed clusters of small, purplish-pink flowers in late summer and early autumn

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 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
Bushy
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
Correct
Plant Range
E North America

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

  • City and courtyard gardens
  • Coastal
  • Cottage and informal garden
  • Flower borders and beds

Pruning

Cut back at the end of the season

Pests

Generally pest-free

Diseases

Generally disease-free