When your large and showy hydrangeas are at peak bloom and color, a gardener's thoughts often turn to ways to preserve their beauty for years to come. Resist the urge to clip hydrangea blossoms at the peak of color, but rather wait until the blossoms dry out slightly on the shrubs beforehand. If your hydrangea blossoms are on weak and thin stems, dry them upside down to ensure the stems stay straight while they dry.
Cut the hydrangea stems from the shrubs after the blossoms dry slightly. Wait until the blossoms feel leathery when you touch them and the bloom colors begin to fade--this indicates the blossoms are drying. Cut the stems at least 8 inches from the shrub.
Remove the leaves from the stems by peeling them off with your fingers. Discard the leaves.
Cut a 6-inch length of twine and wrap three hydrangea stems together tightly near the bottoms of the stems.
Hang the stems upside down in a warm and dry location out of direct sunlight.
Leave the hydrangeas hanging for one to two weeks until the blossoms feel papery. Take the stems down and use them in a vase or in another floral arrangement.