My preferred method is drying the entire plants upside down as well. When conditions permit, I like the drying room to be around 60 to 64°F. For the first couple of days I let the humidity stay around 62%, then around 60% for the next couple of days, and then 58% for the rest of the way. Depending on the size, it can be anywhere from 6 to 13 days. I keep a small fan moving air, but not blowing on the plants, and I learned over time that if you want them to finish around the same time, it really helps to rotate them every day or two. Otherwise the ones near where fresh air is drawn in or near where the exhaust pulls out from will dry faster. To make rotating them easy, when I hang them, I cut the hanging line in the middle, make a loop in each end, and then use a small S hook to join them. That way it only takes a minute to switch their positions around. The best way to know for certain when they’re ready to trim and jar is with a moisture meter. You can get a decent one at Home Depot or Lowes for around 30 or 40 bucks. I use the building materials setting, and I wait for them to go down to between 11 to 13% moisture, then I trim.