To dry, lay the fresh stalks with flowers out on paper bags in a dry part of the house - I use my attic. They will dry in about 3 to 7 days. When they turn brittle, the stems snap when bent and the flowers crumble to the touch, you can store them in an airtight container. They'll keep their max potency for about 6-8 months...long enough to get you to next harvest season :)

You can also tie the stalks in bundles of 4 or 5 and hang them to dry - they look pretty that way.