Salix 'Mount Aso'The Japanese Pink Pussy Willow Tree is a deciduous tree that has silver foliage and masses of fluffy pink catkins in Winter Spring. These catkins look their best in the Winter, as they start to swell which makes for a very eye catching feature for any garden. This Mount Aso variety is hardy and will thrive in most soil types. The Japanese Pink Pussy Willow is best planted in a full sun or partially shaded location.