Source of plant
Dr. Tom Ranney of NCSU takes Exochorda to a new heights with this larger growing Pearlbush with extra large flowers that can be trained into a small tree or pruned to keep as a shrub. A tetraploid hybrid with several Exochorda species in its pedigree, 'Blizzard' has a distinct upright to rounded form that makes it a refined shrub. It reaches 5-6 feet. PPAF.
USDA Hardiness Zone