Subscribe to the Digital Almanac Monthly Magazine!
Reporting
Hi SunriseEast, The reasonHi SunriseEast, The reason that it takes so long is that the temperature is very low and the garlic itself is so sticky. The first year I dried the garlic for only four days and, after I powdered it, it became quite sticky and solid in a few months' time. If you let it get really dry, this doesn't happen.

2015 Special Edition Garden GuideCooking Fresh with The Old Farmer's AlmanacThe Almanac Monthly Digital MagazineWhat the heck is a Garden Hod?