it is very amazing to hear about a apple tree growing in house,it is very difficult and also impossible to grow an apple tree in our state assam,we should buy it from our markets,there are minimum or we can say that none one single apple tree in our state,for the climate,temperature and some other factors which is not suitable for growing an apple tree.By the way,hope and praise that your apple tree doesn't get kill by your surgery and please give us the information abouts its health further.
have a great day ahead friend.