You are misconstruing supply chain necessities for a strategy. To get the fully color-cured, loose leaf from a tobacco farm to a market requires baling it to the dimensions and weight expected by that particular market. Shipping, auctioning, shipping again, warehousing, sorting, portioning, repackaging...all of this requires months or more of aging that just happens to happen.
At their final destination, say at WLT's warehouse, the bales of dry tobacco are opened, and little by little, leaves are separated from the bale, moistened, graded, sorted, and repackaged for retail sale. Then it sits on a shelf, until you purchase it.
Once tobacco has color-cured, there is no problem with it freezing, thawing, freezing, or with the humidity swinging from too low to too high, so long as the 3 day average remains below about 75% RH. When tobacco is out of case...
Curing Tobacco When you begin with leaf from the field (primed or stalk-cut), and then allow it to convert from a living leaf to a dead leaf (of yellow or brown), you have cured the leaf. Often in this forum, we refer to this as "color-curing". There are a number of methods for color-curing...
fairtradetobacco.com
...it will crumble to dust when handled. You just have to either wait for the humidity to naturally rise, or artificially increase the humidity, to bring it into low case for handling.
"Jarring" tobacco is for tiny quantities of shred. With whole leaf that I am preparing to store, I bring it into low case if needed, bag it, then place the bag into a large cardboard box for physical protection.
Then I forget about it. Since my house is not air-conditioned, the bagged tobacco experiences the daily ups and downs of humidity and temperature. It tends to remain rather dry during the winter, and in low case during the summer.
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Bob