Andromeda, Avalanche AndromedaDense, rounded form comes into early spring teeming with long strings of flower buds at stem terminals that open in mid April to clouds of white flowers that barely reveal the leathery, medium green foliage below. 'Avalanche' seems to bloom forever, holding its flowers as the cool of April warms into mid May, still looking like a cascade of white. Chains of White flowers nearly cover the shrub in the spring Flowers are sterile and leave no messy seed