Raw herbal plant material should be stored in an airtight container, away from light/sun, and heat. Keep in a cool place.
This may help:
http://www.ehow.com/how_5836451_rhod...osea-root.html
You can Google, "how to prepare rhodiola" and find more.
It would be a good idea for have a food scale that measures metric, so that you can measure out your raw herb accurately.
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All truths are easy to understand once they are discovered; the point is to discover them.-- Galileo Galilei
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Weezie looking at petunias 8.25.2017
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