meteorologist and avid veggie gardener
By: georgevandenberghe , 11:52 PM GMT on January 23, 2014
My DC suburban home is in USDA hardiness zone 7 (0 - 10F winter minimum). It's been some years since we've reached that but it almost always happened before the 21'st century.
However I have seen several nights that cold this winter and expect several more in the next ten days. I am already seeing more winterkill of marginal plants such as rosemary and "hardy" gardenia than I have seen in many many years here. The last year I remember this much winterkill was 1994. The worst year of my half century in DC for winterkill was 1977 where many established evergreens (boxwood etc) were wiped out. I don't think we'll see a repeat but winter is only half over... .. .. ??
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