Plant sturdy little peach outside

I am 10 years old and I planted a peach stone in my granddad’s greenhouse. It’s about 60cm (2ft) high now. Can you tell me what to do with it during winter and whether I can plant it outside next spring?

Nice work! You’ve got a sturdy little tree which could produce peaches in a few years’ time. The fruit, however, might not be similar to the one from which you got the stone. However, unlike apples or pears, peaches and nectarines grown from seed often produce good fruit, so you’re in with a good chance.
There is no need to keep your tree in the greenhouse unless you intend to plant it in there permanently. Peaches are perfectly hardy and will survive outdoors, provided they are planted in fertile, free-draining soil. The best place is against a west or south-west facing wall or fence, where the tree can be trained into a fan shape.
All you need do now is plant it. Do this when it has shed its leaves and if grown against a wall or fence, plant it 30cm (12in) from the structure.
If the plant has a single stem, prune it. Cut the stem back by half its length. This may seem cruel, but the tree will respond by growing sideshoots which will bear fruit one day.