Check lavender flowers for readiness by examining the flower heads regularly once the plant reaches 2 years of age. Begin to cut the lavender when the first few florets start to open. Continue every day thereafter until you have harvested all the flowers.
Cut flower stalks just below the first pair of leaves. Make a bunch of lavender that is approximately 1/2 an inch in diameter. Tie the bunch securely together with a rubber band. The rubber band should be toward the bottom of the stems to allow the flowers to breathe as much as possible.
Hang the tied lavender stalks in a dark, well-ventilated area, with the flowers pointing toward the floor. Heat the room to 115 degrees Fahrenheit if possible, as this will accelerate the drying process. Check regularly for dryness, which should occur in two to three weeks in an unheated space.