One of the most common shrubs at garden centers is Hydrangea macrophylla (Big Leaf Hydrangea), especially the Endless Summer series of cultivars. Patrons are understandably captivated by the large blue to pink flower clusters (irresistible eye candy), and many a specimen is sold. Sometimes the garden center employee will know enough to tell the patron that this particular new hydrangea flowers on both old and new wood and that to get the blue flowers your soil will need to be acidic which means a biannual addition of sulphur for most Midwest soils. And, as the name implies, it will rebloom all summer and for years to come. Ah, the perfect shrub. NOT! The common industry name for this p