Spiraea x vanhouttei
Vanhoutte Spirea
Rosaceae
ExpandHabitat
- 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.