Spiraea x vanhouttei

Vanhoutte Spirea

Rosaceae

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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.

© Copyright Mark H. Brand, 1997-2015.

The digital materials (images and text) available from the UConn Plant Database are protected by copyright. Public use via the Internet for non-profit and educational purposes is permitted. Use of the materials for profit is prohibited.

Citation and Acknowledgements: University of Connecticut Plant Database, http://hort.uconn.edu/plants, Mark H. Brand, Department of Plant Science and Landscape Architecture, Storrs, CT 06269-4067 USA.