General terms:
* Arboretum: This is the most common term and refers to a botanical garden specializing in trees and woody plants.
* Tree farm: This term is often used for commercial operations that grow trees for timber, paper, or other purposes.
* Tree garden: This is a more general term that can be used for any garden with a focus on trees.
More specific terms:
* Woodland garden: This term is often used for gardens that mimic a natural woodland setting with a variety of trees, shrubs, and wildflowers.
* Orchard: This term specifically refers to a garden where fruit trees are grown.
* Grove: This term can refer to a small group of trees, especially if they are of the same species.
* Forest garden: This term is used for gardens that imitate a forest ecosystem and are designed to be productive and self-sustaining.
Ultimately, the best term to use will depend on the specific type of tree garden you're referring to.