Harvest lavender flowers one stem at a time by cutting 6 to 8 inches below the bloom cluster, or just above the woody part. This allows enough length to bundle the flowers together for hanging.
Cut lavender when the first few flowers are fully open.
Bundle lavender stems together with a rubber band or small gauge wire. Bunch about a dozen together.
Hang upside down in a cool, dark place to dry. This usually takes about 2 or 3 weeks, depending on humidity.
Carefully remove the bundles from their hanging rack, trying not to disturb the dried blossoms. They fall off pretty easily.
Shake bundle into a large plastic bag or container. The lavender flowers should fall off easily.
Keep the container covered and in a cool dry place until the flowers are ready to be made into sachets.