Green infrastructure and urban forests, like any other municipal asset, cost money to create and needs to be maintained. Your long-term plan must provide for maintenance budgets, and municipal authorities (or private partners) should be prepared to fund them. Likewise, private partners and community allies will sustain their commitment only as long as they see the results they expect.
Periodic progress reports will help justify continued funding and prevent erosion of community support. See Pittsburgh’s report on implementation of its newly-adopted urban forestry plan, Portland’s 2013 Implementation Update and New York’s assessment of its Million Tree Initiative. All three examples are primarily narrative assessments, but each ties back to the objectives in the original plan. Regardless of frequency, reports should assess progress toward milestones and explain why, or why they have not been met.