Tiarella cordifolia 'Oakleaf'

RHS Plant Profile

foam flower 'Oakleaf'

Synonyms

Tiarella 'Oakleaf'
Tiarella 'Oak Leaf'

Herbaceous Perennial

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A clump-forming, semi-evergreen perennial, to around 30cm high, forming a mound of deeply lobed, bright green leaves that are similar in shape to oak leaves, and are flushed reddish-bronze in autumn and winter. Small, starry, creamy white flowers are held on upright stems above the foliage, from late spring into summer

Position

Full shade, Partial shade

Soil Types

Chalk, Clay, Loam

Max Height

0.1-0.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity: 2–5 years
Max Spread: 0.1-0.5 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): H5

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Saxifragaceae
Native to GB/Ireland: No
Foliage: Semi evergreen
Habit: Clump forming
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

Thrives in cool, moist, humus-rich soil, in partial or full shade. Protect from drought and excessive winter wet

Propagation

Propagate by division in spring

Suggested planting locations and garden types

Cottage and informal garden
Patio and container plants
Low Maintenance
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