Dear Tony: Thank you for your message. While wind chill may have been for humans, I am of the opinion that such does have an effect on plants. If not I can not fathom the effect on plants of the same species, in the same areas, where some were damaged others not. It was a logical explanation, but perhaps just the fact that there was some protection, (out of the wind) did make a difference. Regarding the roots of plants being less hardy and likely to be more easily damaged by cold, has anyone thought of a 'sleeve' to put around pots? An insulating cover, if you will. Perhaps lining the inside of a container with some sort of insulation may be an advantage in SOME cases. Much like plunging the pot, but less work! Great to think about such things, good for the mind and the more we think about these type of things the more likely we are to come up with practical solutions. Cheers and again thanks and every good wish for 2005! John E. Bryan