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

Hydrangea paniculata Magical Mont Blanc is an upright compact low growing deciduous shrub with dark green leaves. Strong stems with dense compact cone shaped panicles of snow white flowers with greenish tops in summer from July to September. A very rich flowering hydrangea good for smaller gardens and hedges.  Suitable for planting in full sun or part shade conditions.

Eventual height up to 1 - 1.2 metres.