I have grown several (small) trees, native to western Europe, from seed. (Oak, Pine, Chestnut, Walnut, Plum, Maple, Beech, etc). I have had the fortune of having some space in the garden where I could grow them and let them "overwinter" outside; however soon I will be moving to an apartment, and I won't have any outside space anymore.
While doing some research I read, that plants from this region, need a cold period in winter to grow successfully.
Would it be sufficient to leave them in a separate room with the windows open, to allow them to experience some colder temperatures. Or will I have to resort to more extreme measures?
Also, I have already determined that I will probably need grow lights and will have to control the humidity, because I have read that I will have to keep the humidity at around 50-60%. Are there other factors that I need to consider?
Another thing I was considering was getting a grow-tent and using that to circulate outside air around the plants.
Any tips or feedback would be much appreciated!