Posted: 01/05/2017 at 12:36
They really need to be planted permanently in the garden but you can keep them in large (50cm+) pots for a few years. They will eventually blossom and produce apples but they might not be very big or nice to eat although the blackbirds will love them when they fall. Bear in mind that they will grow into large trees, likely much bigger than a standard grafted tree. You could try grafting scions (twigs) from an eating apple tree onto them and cut off the rest of the tree if those take. However, grafting is an art and you would need to read up on it before trying that. 'Bud grafting' is the least difficult.