I got lazy with my 2014 crop, after air-curing in the shed in the fall, I processed/shredded only about 5-7 lbs, then stored in sealed glass jars in low/mid-case to age. The remainder is still aging in the shed.
This last few months, I pulled more of this over-wintered shed-tobacco, processed, again stored in glass jar.
Comparing the two, the tobacco that spent more time in the shed is noticeably milder, tastier, and a better smoke for cigs, and it's also better than my kilned tobacco.
These were half 'African Red' strain, and the rest 'Costello' and 'Yellow-Twist-Bud' burley strains.
I still have about 40% of my 2014 crop hanging in the shed, am going to leave it for another year. I expect it will continue to improve. (after growing since 2010, got plenty of smokes stored inside in FmGrowit's bags, so can afford to use the shed space). This shed-tobacco is crispy-crunchy, very low-case dry for almost all of the time it's in the shed, and shouldn't be aging much, but it does. I guess I'll confirm this next summer when I process the remaining tobacco.
Thus goes my experiment. Initially, I was concerned that mold could be a problem on very humid rainy or summer days, but this low-case tobacco seems immune. Could be a problem for those in southern states, but it works for me, or maybe I'm lucky. If this works next year, I'll have a better process for smokes - just let it hang in the shed for a few years, less work and better smokes.