Plant Database

Habitat

  • result of cross between S. trilobata and S. cantoniensis
  • zone 3

Habit and Form

  • a deciduous, vase-shaped shrub
  • 6′ to 8′ tall with a spread of up to 12′
  • branches arch to ground, making an open airy mounded habit
  • fast growth rate
  • fine texture

Summer Foliage

  • alternate leaf arrangement
  • simple small leaves
  • 0.75″ to 1.5″ long
  • leaves have a pointed tip
  • 3 to 5 lobes
  • irregular teeth cover margin
  • dark blue-green color

Autumn Foliage

  • some red coloring
  • not reliable

Flowers

  • white flowers
  • blooms April to May
  • flowers form on branch tips
  • flowers are borne in umbels with numerous individual flowers
  • umbels are 1″ to 2″ in diameter
  • very showy

Fruit

  • dry, brown follicles
  • hold through winter
  • not ornamentally significant

Bark

  • thin brown stems
  • glabrous
  • predominately branches from base
  • branches at 90 degree angles
  • buds held on stems at 90 degree angles
  • buds are divergent

Culture

  • full sun to light shade
  • prefers well-drained soil
  • transplant from container for best results
  • soil tolerant
  • extremely durable shrub

Landscape Use

  • for showy flowers
  • group or mass plantings
  • for border
  • for foundation plant
  • for texture

Liabilities

  • suckers
  • fireblight
  • leaf spot
  • powdery mildew

ID Features

  • white flowers are stem tips
  • brown follicles that is held through winter
  • thin brown stems
  • buds held at 90 degree angle from stems
  • branching pattern at 90 degrees
  • vase-shaped
  • lobed leaves with serrated margins
  • alternate leaf arrangement

Propagation

  • by softwood cuttings
  • by seed

Cultivars/Varieties

‘Pink Ice’ – Sometimes offered by specialty nurseries, this novelty plant offers young foliage that is splashed with pink and white. It may revert, plus the leaves usually mature to a uniform green by summer. The plant can reach 5′ tall in time.

‘Renaissance’ – Very similar to the type species, this selection reportedly exhibits greater resistance to leaf ailments.

‘Snow White’ – This may be the best form, as it grows compactly to 5′ and appears less prone to foliar disease. The dead blooms are self-cleaning and the foliage is larger and healthy green.

Snowmound Spirea in bloom

Snowmound Spirea in bloom

(Photo courtesy of NetPS Plant Finder)

Snowmound Spirea flowers

Snowmound Spirea flowers

(Photo courtesy of NetPS Plant Finder)

Height: 4 feet

Spread: 5 feet

Sunlight:

Hardiness Zone: 2b

Description:

A stunning specimen shrub absolutely smothered in snow-white flowers in late spring held along gracefully arching branches, attractive shape and foliage the rest of the year; needs full sun and well-drained soil

Ornamental Features

Snowmound Spirea is bathed in stunning clusters of white flowers held atop the branches from mid to late spring. It has bluish-green foliage throughout the season. The small serrated oval leaves turn an outstanding coppery-bronze in the fall. The fruit is not ornamentally significant.

Landscape Attributes

Snowmound Spirea is a multi-stemmed deciduous shrub with a shapely form and gracefully arching branches. Its relatively fine texture sets it apart from other landscape plants with less refined foliage.

This shrub will require occasional maintenance and upkeep, and should only be pruned after flowering to avoid removing any of the current season’s flowers. It is a good choice for attracting butterflies to your yard, but is not particularly attractive to deer who tend to leave it alone in favor of tastier treats. It has no significant negative characteristics.

Snowmound Spirea is recommended for the following landscape applications;

  • Accent
  • Mass Planting
  • General Garden Use

Planting & Growing

Snowmound Spirea will grow to be about 4 feet tall at maturity, with a spread of 5 feet. It tends to fill out right to the ground and therefore doesn’t necessarily require facer plants in front. It grows at a fast rate, and under ideal conditions can be expected to live for approximately 20 years.

This shrub should only be grown in full sunlight. It prefers to grow in average to moist conditions, and shouldn’t be allowed to dry out. It is not particular as to soil type or pH. It is highly tolerant of urban pollution and will even thrive in inner city environments. This is a selected variety of a species not originally from North America.

Nippon spirea

Size form

A 3 to 5 feet high and wide shrub with an vase-shapedhabit and arching stems.
An improved replacement for bridal wreath spirea.

Tree & Plant Care

Prefers full sun in moist, fertile, well-drained soil.
Flowers on old wood, prune after flowering. Older shrubs can be cut to ground to rejuvenate.

Disease, pests, and problems

Leaf spots, mildews, root rots

Disease, pest, and problem resistance

Deer

Native geographic location and habitat

Japan

Attracts birds, pollinators, or wildlife

Butterflies and bees

Bark color and texture

Reddish thin stems

Leaf or needle arrangement, size, shape, and texture

Small, dark blue-green leaves

Flower arrangement, shape, and size

Dome-shaped clusters of small white flowers (corymbs) appear in late May

Fruit, cone, nut, and seed descriptions

Not ornamental

Cultivars and their differences

Snowmound Nippon Spirea (Spiraea nipponica ‘Snowmound’): 3 to 5 feet high and 4 to 6 feet wide, vase-shaped with arching stems, blue-green leaves that turn yellow in fall.

Wedding Cake™ Nippon Spirea (Spiraea nipponica ‘SMNSNFD’): Improved Snowmound spirea, with pure white flowers and dark blue-green foliage

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