Trio

A traditional NAP trio layout.

A trio is a planting of three different tree species in an arrangement where no species is planted next to another tree of its own species. This is the recommended layout for orchards. Typically a nitrogen fixing tree is included in this layout to fertilize the soil. This arrangement positions nitrogen-fixing trees adjacent to the other trees and isolates pests to prevent them from easily spreading.

NAP

NAP is a common trio.

• N : Nitrogen-fixing tree, such as honey locust
• A : Apple tree
• P : Pear or plum