Lychee is a sub- tropical tree but it is certainly one that does not mind the experience of winter as well.
It will not do well where winters are warm or very wet but everywhere else, is a natural.
No need to introduce the fruit but, if you have only ever had canned or commercially produced lychee’s, then fresh ones, matured on the tree will surprise you with their fragrance and flavour.
They are very easy trees to maintain and will start fruiting at quite a young age.
These are tubestock potted seedlings. (Not ready to be planted out until more mature)