JPD06
ActiveHydrangea quercifolia W. Bartram · Oakleaf hydrangea
Jean-Paul Davasse
Variety traits
Frost Hardiness of Oak-Leaf Hydrangea
Hydrangea quercifolia W. Bartram
Oak-leaf hydrangea (Hydrangea quercifolia) is rated for USDA hardiness zones 5–9, tolerating winter temperatures down to -29°C. A key agronomic limitation is the risk of frost damage to flower buds on previous year's growth, which leads to a loss of blooms.
In the reference 9 varieties crop Oakleaf hydrangea, where this is mentioned in the description.
For oak-leaf hydrangea, frost hardiness is limited to USDA zones 5 through 9. The plant is capable of surviving temperature drops down to -29°C; however, if this threshold is exceeded, damage to the aerial parts and root system may occur.
The primary ornamental factor of the crop is associated with the preservation of generative buds that form on old wood. Damage to these buds, even during moderate frosts, prevents the plant from flowering in the current season, which necessitates a specific approach to pruning and winter protection of young specimens during the first three years after planting.
General information about the subject — on the page Frost hardiness.
Varieties of Oakleaf hydrangea mentioned in the description
Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.
Ice Crystal
ActiveHydrangea quercifolia W. Bartram · Oakleaf hydrangea
Plant Select N.V.
BRIHON
TerminatedHydrangea quercifolia W. Bartram · Oakleaf hydrangea
DAVID A. JARZYNKA