What Are Hydrangea Paniculata?
Hydrangea paniculata is a deciduous woody plant with serrate leaves and flower heads made up of showy, sterile flowers mixed with smaller, fertile flowers. What sets it apart from other species is the structure of the inflorescence, which is typically a cone-shaped panicle. The only other Hydrangea that has flowers arranged in a panicle is Hydrangea arborescens, and that is distinguished by having lobed leaves.2
White Diamonds hydrangea (Hydrangea paniculata ‘HYPMADI’)is a relatively new variety of Hydrangea paniculata with gorgeous white frothy blossoms on strong stems. It grows 4-5 feet tall and wide and is extremely prolific and hardy. This variety is an exceptional compact hydrangea with glistening white panicles (long cone-shaped clusters) that are held upright and eventually fade to parchment and pink. It has dark-green leathery foliage that displays increased heat and drought tolerance. Blooms typically last into fall.
Regular fertilizing of Hydrangeas is typically not needed. Occasional applications organic liquid fertilizers can be beneficial. They can be used monthly during the growing season. Using a compost tea such as Soil Soup is also beneficial. This adds life (micro-organisms) to the soil. Aluminum Sulphate is considered a fertilizer, but it is only useful for turning flowers of certain hydrangeas blue. This does not act as an all-purpose fertilizer.1
Prune shrubby hydrangeas in late winter to early spring. Every year, head back the branches by about one quarter to one third. Make each heading cut just above a pair of plump buds. Every third year or so, completely remove some of the oldest canes. Climbing hydrangeas need only be pruned to shape or to remove spent flowers. To dry the flower heads, pick them when in their best color and condition (usually in late August to early September). Hang them head down in a cool dry place for 2-3 weeks.3