1. Tree Care Service: A business providing professional tree care services for both residential and commercial clients. This would include services such as trimming, pruning and removal of trees, as well as planting and maintenance.

2. Tree Planting Business: A business providing tree planting services for both residential and commercial clients. This would include planting and caring for new trees, transplanting existing trees, and consulting on appropriate species or varieties of trees to be planted.

3. Arborist Consulting Service: A business providing advice and consulting services related to arboriculture. This would include species selection and care instructions, tree health diagnosis, emergency tree services, and pest control.

4. Tree Nursery Business: A business providing trees, shrubs, and other plants for sale. This would include sales of trees, shrubs, and other plants for both residential and commercial use, as well as providing services related to their care.

5. Tree Inventories: A business providing surveys of existing tree populations. This would include cataloging the size, species, condition and other characteristics of trees in a given area, and providing a report on the findings.