How long it takes to dry depends on your drying area and how you trim it; if you leave the plant whole and just trim the leaves, it will take longer than if you cut it into sections. Trimming the bud completely off the stem and screen drying is quickest but I wouldn't recommend it. I usually snip off managable branches to trim and hang. Typically within 5-6 days they're dry enough to jar up. Some people say wait til the stems snap but for me the buds are too dry by that point. The jar gets is opened and aired 4 or 5 times a day or more, until the buds feel right to the touch.