Sorry, this is more about flowers than gardening, per se: -
Can anyone recommend a flower to be used in table centrepieces on the weekend after Christmas? Preferably not one that's overly "Christmassy" looking; more with the promise of Spring (!) and that can be purchased at a Christmas Eve flower market and last until 28th December?
I'm a bit clueless about what's in season and what might last!
You're very welcome. If you get a block of florists foam (it's green foam, you just stick the flowers into it to shape them), that would be fab. Green foliage around the base (add a little holly and ivy for the festive feel), then a mix of roses and carnations above. If you want to put candles at the top you need to secure them with some wire or sticks like kebab skewers (sharp point into the base of the candle.
Depending where you live you could see if any of your neighbours have any Vibernum tinus in flower which you could add. I like the Aircooled's Anemone suggestion, love the wintry looking ones with the hint of red.
Paper White narcissus are available at the moment as well if you want a spring theme.
I like winter jasmine, ivy, and the flowers and leaves of fatsia japonica. Fir cones, holly and poinsetta are also good. Hellebor flowers floating in water can be nice , I dont put roses in because I think of roses as summer flowers and its nice to celebrate winter