A peach tree is a self-fertile fruit tree, so you only need one plant to produce fruit though it may take three to four years before it does so. The deciduous peach tree grows best in full sunlight, acidic and sandy soil, and moderate temperatures, but not the tropical temperatures that are necessary for citrus fruits like lemons. There are dozens of peach tree varieties, even dwarf cultivars that you can grow in a container. All parts of the peach tree, except for the edible fruit, are toxic to humans and pets.