
I say you can with the proviso, that you can keep it warm during the night and day. Keep it moist but not wet.
To prove the point I have just done some Shohin and Shito in training. These are Ficus rubiginosa.
The following pictures will show what I have done and where I will keep them when it warms up.
You will notice some polystyrene sheeting underneath the small ones, this helps to keep the soil and tree warm. The Flap at the front will be wound up during the day until we start to get consistently above 15% at night .

