Posted: 06/02/2018 at 15:04
I would plant them in their containers now. I would put the plum outside ... it's hardy and doesn't need protection.
If the fig has some tiny baby figs on you might get a better crop if you keep it in the greenhouse during this very cold spell, but when spring comes it too will be happy outside if you have a sunny sheltered spot.
My Brown Turkey is outside all year around ... it's planted in a container of JI No 3 loam based compost with added grit at a ratio of about 3:1 and lives on our terrace in the south-east facing corner ... it could do better if it faced due south, but that's the best spot I can offer it.