Buy the 2015 Old Farmer's Almanac!
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I had never heard of itI had never heard of it before either; I found this on the website I buy soaps & lotions from. Sounds like you could go to a local Herbal Store. Copy & Paste. :) http://www.mountainroseherbs.com/learn/orris.php

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