Salix gracilistyla 'Mount Aso' is a distinctive ornamental willow grown primarily for its large, richly coloured pink catkins, which appear in late winter and early spring. These soft, vibrant catkins provide valuable early interest at a time when little else is in flower, making the plant especially effective in seasonal displays and for cutting. The shrub forms a well-balanced, spreading shape and responds well to pruning, which helps maintain vigour and encourages prolific catkin production. Hardy and adaptable, 'Mount Aso' is a striking choice for UK gardens seeking early colour and structure with minimal ongoing care.