Spiraea x vanhouttei Vanhoutte Spirea RosaceaeHabitat
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
http://www.hort.uconn.edu/plants/s/spivan/spivan1....