When should we dig out the tubers of Dahlia?

I just started gardening from last spring and I planted a lot of beautiful Dahlias. Someone told me that I should dig out the tubers before winter comes. When should it be? Thanks.

When should we dig out the tubers of Dahlia?
I work at a private greenhouse/garden and we are going to dig our dahlias any day. Ours were covered and protected from frost so the foliage just died due to a freeze we had. Dig your dahlias soon, definitely before the ground freezes.
Reply:Just remember where you put them. I dug up my begonias last year and still can't find them :)
Reply:If you live in an area with mild winters, you don't need to dig them up as long as they are in soil that drains well. Otherwise, dig them up before a hard freeze. Dry them out for a couple of days, then put a layer of peat moss in a box. Add the tubers, then cover with more peat moss. Keep in a cool, dry place such as a garage or basement through the winter, keeping the peat moss just barely damp. Plant in spring when danger of frost is past.
Reply:In cold climes, the tubers won't survive. Remove them, store them in a cool place (basement) in wood shavings or wrap loosely in newspaper. Do it as soon as the blooms are gone.
Reply:You should wait till the first frost makes the leaves wilt, then dig them out and store them in a cool, dry place. You can start them in a grow-bag in a bright spot indoors in early April, then if you plant them out you get flowers earlier.

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