I don't know how this cold weather will affect them, but I put lisbon lemon buds on trees at my sisters' and my nephew's over in Alabama today. Lisbon lemon is the only budwood I have available right now.
The first one I did was out in the open exposed to the cold wind that was blowing. The tree is flushing and the bark was slipping, but the bark was not all that pliable. I think I did 6 bud on 2 trees there, but only one bud felt like it went in right at the start. The others kept slipping out or going in crooked. When I got to my nephew's the trees were protected from the wind and it felt a lot warmer in the sun-- all of the ones I did there went well.
I don't know if the cold weater will give the busd more time to connect before the buds die, or mean that there is less sap to help get the buds to take. It could get down to 32 over there tonight. I guess we will see.
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Skeet