After flowering, the summer, the flowers of most hydrangeas begin 's dry, the color is dark, greenish This is the time to prune off the flowers and dry Some tips:... -Snoei Flowers best on a dry sunny day. Do not wait until "evening. -Remove The leaves from the stems. -Hang The flowers on a warm, dry and dark place. How dry? The cut branches hanging upside down in a dry warm place (not in the sun). Place the flowers with stalk in a bowl or vase with a little bit of water. Fill the water no longer and let the stems are quiet. Put the stems in a damp oasis block. Let further dry out the block. You can also cut the flowers without stalks and dry by placing them in newspapers or in a container with a layer of dry sand. Place them in a warm, dark place. Do you want to dry the flowers retain their color, then you cut the flowers off without stalk and lay the flowers upside down in a container with sand (eg fine sand that you can buy at the pet store). Cover the flowers gently with the sand. The sand will extract moisture from the flowers.