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

Hydrangea paniculata Little Hottie is a bushy, compact mass blooming hydrangea with sturdy tight upright stems of dark green leaves. Large panicles of pure white flowers open in summer with green tips becoming old white then pink in autumn. Heat tolerant. Suitable for planting in full sun or part shade conditions. Good for small hedges or for pots and containers. 

Eventual height and spread up to 1.2 to 1.5 metres.