Few varieties need a second tree to help them produce fruit
Yes and no. Citrus trees like lemons, limes, and oranges are self-fertile and require no pollinator (which also makes them popular for indoor growing). Most apricots, figs, nectarines, peaches and persimmons are self-fertile; only a few varieties need a second tree to help them produce fruit.
There are also a few varieties of apples, cherries, pears and plums that don’t require a pollinator. But most other deciduous fruit trees do need a second pollinating tree, and most of those require specific varieties to pollinate with. The trees don’t need to be right next to each other, but should be fairly near each other to promote the best pollinating results.
Our staff of garden experts knows which trees make the best “mates” for others, and will be happy to help you with any questions.