Cold hardiness of potted plants left outdoors in winter

Peter Taggart
Mon, 08 Oct 2012 11:59:23 PDT
I think that there may be drought induced death in many plants if the roots
freeze in a pot, whereas in the ground though the bulk of a tuber or  bulb
etc, including most of it's roots, may be frozen solid, the few roots which
have their tips deep enough may keep the plant going. (While frozen there
is very little moisture of a liquid form available to the plant.)
I particularly feel that this may be the case with Cyclamen and rhizomatous
Iris. This could equally well aply to the rootstocks of woody plants.
Peter (UK)

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