Thanks, for the interest, and sorry about the damaged trees.
I believe there was more than one factor that helped my trees meet a premature end. First, sudden and deep freezing, that lasted for weeks. This came before new growth had a chance to properly harden off, Second, desiccation....the containerized figs were frozen solid, for month after month, and no water penetrated into the frozen root balls. Only after the temps went above freezing, in mid-March, did the root balls thaw out. When I was finally able to inspect the trees and roots, I knew it was too late. The bark was smelly and slipped right off the lower trunk and roots when rubbed. If I had a small, heat source in my shed, the frozen trees might have defrosted enough for me to get some moisture around the roots, but the trees were just blocks of ice from Dec-March. Honestly, I think my trees were killed by the time December ended. While trees are in my shed I usually add some moisture to the containers every few weeks, or, shovel snow and ice into the containers, to slowly melt over the weeks in storage. In the past years, the temperatures inside my shed never got as low as they got this year. It was brittle-cold!
When I inspect my trees, usually at the end of March, I have always found that buds were starting to swell and become a nice, healthy green. This year, any buds were shriveled, hard, crispy, and had that sick, grey, look to them. The dead twigs, and branches all had the tell-tale, rusty-brown color, and just snapped like dry spaghetti. The majority of the trees were young and planted in 5-gallon buckets. The two oldest trees, the "Red Italian" and "Atreano" both in 25 gallon pots, and, just recently thawed out, are still on my front porch. I will wait for a few months before I toss them into the garbage truck. Maybe they will re-sprout, but they both look real bad.
I will NOT go through this again, and I refuse to give up growing figs because of a little bit of depressing, hard luck. I just got to get my head straight, and become a smarter grower. I will cost me a few bucks, but next fall, I will take more precautions to guard against winter-damages...especially, with getting some added heat into my shed.
Frank