Also known as Viburnum opulus ‘Sterile’. Large, snowball-shaped flowers emerge lime-green and mature to pure-white. Flowers in mid-spring. A robust, upright grower with arching branches. Green, maple-like leaves turn orange and red in autumn. No berries. Viburnum opulus ‘Roseum’ (Snowball Tree) grows to 3m (H) x 2m (W) in 10 years.