Exochorda × macrantha 'Niagara'

RHS Plant Profile

pearlbush 'Niagara'

Synonyms

Exochorda × macrantha 'Niagara', Exochorda × macrantha [Snow Day Surprise], Exochorda racemosa [Snow Day Surprise]

Shrubs

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A fast-growing but compact variety which is a cross between E. racemosa and E. x macrantha 'The Bride'. An abundance of white flowers with yellow centres are produced from April until May. Good for borders or in a pot.

Position

Full sun

Soil Types

Chalk, Clay, Loam, Sand

Max Height

1-1.5 metres

Max Spread

1-1.5 metres

Size

Time to Maturity: 5–10 years
Max Spread: 1-1.5 metres
Max Height: 1-1.5 metres

Growing Conditions

Chalk Clay Loam Sand

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

Position

Full sun

Aspect: North–facing or South–facing or East–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

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Rosaceae
Native to GB/Ireland: No
Foliage: Deciduous
Habit: Bushy
Genus: Exochorda are bushy deciduous shrubs with simple, pale green leaves and saucer-shaped, 5-petalled white flowers in terminal racemes in spring or summer
Name Status: Synonym

How to Grow

Cultivation

Grow in moist but well-drained soil

Propagation

Propagate by softwood cuttings

Suggested planting locations and garden types

City and courtyard gardens
Cottage and informal garden
Patio and container plants
Flower borders and beds

Pruning

pruning group 2

Pests

Generally pest-free

Diseases

May be susceptible to honey fungus (rarely)