Mini-Forests

Mini-forests have been planted in many countries, from France and the Netherlands in Europe, to India and Japan. Mini-forests have also been planted in several cities in the U.S. The first mini-forest in New England was planted at Danehy Park in Cambridge, Massachusetts in 2021. Cambridge planted its second mini-forest in 2022.

All of the vegetation planted in a mini-forest must be native to the region and should be compatible with conditions unique to the planting site. Generally, between 30 and 50 different species are planted. Most of the species are canopy trees, understory trees, and shrubs. The trees and shrubs are planted as seedlings. Before planting, the soil is de-compacted and enriched with compost to ensure that seedlings have access to ample food and nutrients. Approximately three seedlings are planted per square yard. After planting, the soil is topped with mulch to encourage moisture retention and deter weeds. Fencing may be needed to protect the mini-forest from animals during the first three years.

The cost of planting a mini-forest depends on its size and the amount of preparatory work needed. Expenses include plants; labor, supplies, and equipment associated with preparing the soil; and fencing to protect the mini-forest during the first three years. Planting seedlings is less expensive than planting 6΄-8΄ trees. Using volunteers to plant a mini-forest helps the town save in labor costs. Once a mini-forest is planted, the costs are minimal. Periodic weeding and watering are needed only in the first three years. After three years, the forest maintains itself.

Brookline residents will be invited to share their thoughts in public hearings about proposed locations for a mini-forest. Additionally, all community members will be encouraged to participate in planting the mini-forest and helping with weeding and watering in the first three years. Most importantly, it is hoped that Brookline residents will enjoy the forest by watching it grow and experiencing the shade and biodiversity it brings to the surrounding area!

A large and growing number of print and online resources are available. Here are just a few:

• Mini-Forest Revolution by Hannah Lewis, Chelsea Green Publishing (2022)
• How Plants Cool the Planet
• The first Miyawaki forest in the northeast was planted in Cambridge
• Biodiversity for a Livable Climate (Cambridge, MA)
• Urban Forests