Final answer:
The community health nurse should first identify community members who demonstrate an interest in the project.
Step-by-step explanation:
The first action the community health nurse should take to initiate the plan of establishing a community garden is to ID community members who demonstrate an interest in the project. This is important because it will ensure that there is community support and engagement in the garden. By identifying interested community members, the nurse can also form a core group of individuals who can help with planning, organizing, and maintaining the garden.