should I cover seeds on cold nights?

The directions on my little finger carrot seed pack say seeds can be planted "as soon as soil can be worked" weather forecast is for 20 degree temp at night next couple of days.....do I need to cover? if so with what?
Also planted some onion and shallot sets.......will they be ok? Any advise appreciated.
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On Wed, 24 Mar 2010 17:34:59 GMT, snipped-for-privacy@home.com wrote:

Nope. You are good to go.

Yep. They will be fine

Gardening...or otherwise? Some of us have advice for all sorts of stuff, not all related to gardening, more like over the fence type of stuff whilst watching stuff grow and be munched upon. We are even quite good at unsolicited advice and commentary.
Charlie, watching the rivers rise after a couple inches of rain and recent snowmelt and saturated ground and all that stuff
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On Wed, 24 Mar 2010 17:34:59 GMT, snipped-for-privacy@home.com wrote:

I haven't had problems with carrots and cold. If your soil has allot of clay and forms a crust before they come up that can hurt. I cover the seed in my garden with sifted compost. I plant shallots in Ohio in fall and they do fine through the winter but the onions might not like to be frozen solid which I'd guess could happen if they are planted shallow.
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