This Hydrangea is a deciduous plant so during the dormant season autumn winter it will lose all its leaves shooting new growth in the spring. 

Oak leaf Hydrangea

Hydrangea quercifolia Sike's Dwarf is a dwarf form of quercifolia. Deciduous shrub with mid green oak shaped leaves turning bronze-red in autumn. Produces creamy-white showy cone shaped flowers in summer. Prefers a well drained humus rich soil in full sun or part shade.

Eventual height up to 0.6-0.9 metres