I did`t find eny information about the temperatures.
They are saying the tree need protection from freesing temperatures.
Where i should keep my tree in winter ? I have -10-20 sometimes and -5-10. Should i put tree indoors where the temperature is 18-23?
It`s too hot for tree?
I understand how to take care in summer but in winter i don`t know where and how i should take care of the tree
It's a tree. Trees don't grow indoors by nature.
Malus can tolerate freezing temperatures. I don't know its exact limits - I could look that up, but so can you.
Keeping it indoors during the winter will eventually kill it.