To ensure that the greenery of the Christmas wreaths - be it fir, branches of pine, conifers or eucalyptus - stays fresh for as long as possible, the Christmas wreath should be kept as cool as possible. It dries out more quickly directly next to a heater or stove. As the home is not exactly a cool place in winter, it helps if you can at least keep the wreath cool at night (on the balcony or in a cool room, for example). You can also spray the wreath lightly with a little water every day. This works even if the wreath is decorated with dried flowers. The thin film of water dries quickly in the warmth.
There's not really much more to say about caring for Christmas wreaths. All that remains is to enjoy the wreaths.