Achillea millefolium 'Proa'

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Alpine Rockery Herbaceous Perennial

A hardy, clump-forming perennial to around 80cm in height, with finely divided, aromatic green foliage. Flat clusters of fragrant, pure white flowers appear from summer to early autumn. Excellent drought tolerance once established. Selected for its high essential-oil content and vigorous growth, it is ideal for borders, naturalistic plantings, and pollinator-friendly gardens

Position

Full sun, Partial shade

Soil Types

Clay, Loam, Sand

Size

Time to Maturity
1–2 years

Growing Conditions

Clay Loam Sand
Moisture
Moist but well–drained or Well–drained
pH
Acid or Alkaline or Neutral

Position

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)
H6
Drought Resistance
Yes

Colour & Scent

Fragrance Flower Foliage
Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Asteraceae
Native to GB/Ireland
No
Foliage
Evergreen
Habit
Bushy, Clump forming
Genus
Achillea can be mat-forming or upright perennials, mostly herbaceous, with sometimes aromatic, pinnately divided or simple and toothed leaves and flattened clusters of small, daisy-like flower-heads
Name Status
Accepted

How to Grow

Cultivation

Grow in an open, sunny position in well-drained soil

Propagation

Propagate by seed or by division in the spring. Sow inside from March to May or outside after the last frosts until June

Suggested planting locations and garden types

  • City and courtyard gardens
  • Cottage and informal garden
  • Gravel garden
  • Patio and container plants
  • Rock garden
  • Wildflower meadow
  • Wildlife gardens
  • Flower borders and beds
  • Underplanting of roses and shrubs

Pruning

Cut back after flowering

Pests

May be susceptible to aphids

Diseases

May be susceptible to powdery mildews