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Old September 20, 2011   #6
hmacdona
Tomatovillian™
 
Join Date: Jan 2009
Location: Calgary, AB Canada (Zone 3A)
Posts: 443
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I'm in zone 3a and I usually keep my a few of my tomatoes going until close to mid october. I just cover them with old bed sheets at night and sometimes clear poly if I run out of sheets. The bedsheets work best for me though, as they drape over any size plant easily and seem to hold in place better as I am in a windy area of the city. Not fancy, but keeps the frost off them.
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