Using parchment paper on my dehydrator trays makes this grinding part easier. I push the dried garlic to the center of the paper, and lift the sides to slide it into the coffee grinder.
The jar I use fits my canning funnel, making that part easy too. You could use a smaller funnel for smaller jars. We use garlic a lot, so hence large jar.
I dump out the older garlic powder into a cup with spout, put the new garlic powder in first, then the older on top. All set for another year (maybe, ha ha!).
It's not exactly a quick job. I wash all the trays after I dehydrate, so tastes and smells do not permeate into the next dehydrated food. I wash the coffee grinder and clean out anything that blew off the trays inside the dehydrator.
Question about rhubarb:
Our rhubarb died last year, and we were going to move it anyway.....but...
I believe someone on here bought root starts online one year. I can only find seeds (organic, non-gmo), and our local produce stand that sold them, closed their doors.
Where can I find them online? If not, I need to order seeds or check our garden stores here.