Tyne And Wear,
United Kingdom 
seen some lovely photos of Dahlias on here.Can you just leave them in the ground or do they need lifting every winter
9 Aug, 2010
Answers
thanks Janey.When I finally finish with all the hard work in the garden will try some but for the moment the plants need to look after themselves...
9 Aug, 2010
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Hi....Looking where you are from....I would definitely lift them, dry them and start them off again the following spring. They would rot in the cold and damp especially in a winter like the last one.
9 Aug, 2010