Tiarella 'Happy Trails' (American Trails Series)

RHS Plant Profile
foam flower 'Happy Trails'

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Herbaceous Perennial
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An evergreen perennial, with a spreading, running habit and palmately lobed, slightly hairy green leaves with black veins. Small, starry white flowers are borne on short, red, upright stems in spring

Position

Full shade, Partial shade

Soil Types

Chalk, Clay, Loam

Max Height

0.1-0.5 metres

Max Spread

0.5-1 metres

Size

Time to Maturity
2–5 years
Max Spread
0.5-1 metres
Max Height
0.1-0.5 metres

Growing Conditions

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

Position

Full shade Partial shade
Aspect
East–facing or North–facing or West–facing
Exposure
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
Saxifragaceae
Native to GB/Ireland
No
Foliage
Evergreen
Habit
Spreading branched
Genus
Tiarella are rhizomatous herbaceous perennials forming a clump of rounded, more or less palmately lobed leaves, with very small, star-shaped flowers in terminal panicles or racemes on erect stems
Name Status
Accepted

How to Grow

Cultivation

Ideally grow in cool, moist, humus-rich soil, in partial or full shade, but can tolerate a range of soils and can spread freely. Protect from drought and excessive winter wet

Propagation

Propagate by division in spring

Suggested planting locations and garden types

  • Cottage and informal garden
  • Hanging Basket
  • Patio and container plants
  • Low Maintenance
  • Banks and slopes
  • Flower borders and beds
  • Ground cover
  • Underplanting of roses and shrubs

Pruning

No pruning required

Pests

May be susceptible to slugs and vine weevil

Diseases

Generally disease-free