Viburnum p. t. Summer Snowflake (Summer Snowflake Viburnum)Compact, spreading form Blooms throughout the summer months Flattened, white flower heads along the stems Showy Great along the foundation or border Compact, spreading form that blooms throughout the summer months with flattened, white flower heads along the stems. Very showy, excellent choice for summer interest along the foundation or border. See pages 14 15 for more details on the White Flower Farm program. Hardiness Zone 5 8 Height 3 5 ft Spread 3