Viburnum "Summer Snowflake"- The viburnum family has many excellent plant. "Summer Snowflake" is one of the best flowering ones. Pest free and durable, it has waves of flowers repeatedly from May until October. This is not a fragrant viburnum and does not set berries like some other viburnums. Reaching 8-10’, this shrub needs good light and good drainage but is undemanding other than that.