Plants use two indicators to tell them when to get going:-
- Soil temperature.
- Light - both its intensity and the length of the daylight hours.
What's happening is that the usual winter indicator of falling soil temperature isn't happening, or at least not when it 'normally' does, so plants are fooled. Not just plants either - the fish in my pond are continuing to be active and are feeding normally, some time after they would have descended to the bottom and stopped feeding for the winter. Almost unbelievably, swallows have been sighted flying on Teeside.
Our big Magnolia tree is showing every sign of flowering for the second time this year,and I saw bees flying in the sunlight on Friday.