You39ll be amazed at the size of these beautiful blooms33 this vigorous hardy hydrangea delivers massive 30cm 40123441 flower heads that emerge lime green change to pure snowy white in the summer and then fade to pale green as they mature the long45flowering blooms of hydrangea arborescens 39incrediball39 are held upright on sturdy thick stems that prevent flopping even in inclement weather height and spread 2m 40793441