Panicle hydrangeas are a bit more formal looking than their American cousins. The tall types are most often planted as individual specimen shrubs out in the lawn where their handsome flowers can be dramatically displayed. Sometimes homeowners plant them in rows along property borders, or train them to a wall or trellis, fanning their branches in a pattern to provide an effective screen. These shrubs are not very successful as foundation plantings along the house or in shrub borders with other plants.
Drying : Hydrangea blossoms make excellent dried flowers. Cut mature blossoms and hang them by their stems in a dry, warm area until they are dry. An alternative is to put them in a vase with a little water, allowing the water to gradually evaporate.
For more information see Drying Flowers and Flower Drying Supplies