Marly, France

Paul Joly Forest

Bringing life and restoring soul to a newly built development in the Lorraine region.

Pocket Forest
Miyawaki Method

Paul Joly’s Forest is an ambitious project in a suburban city south of Metz: 7200 trees will bring charm & soul back to this newly built park and protect the residents from the heavy traffic nearby.

Our goal is not only to boost biodiversity, reduce the harmful effect of air pollution, noise and excessive heat, but we also want to bring the community together to reflect on the place we want to give to nature in our life, the passing of time and ensuring a more resilient environment for the next generations of the city.

The summers in the east of France can be extremely hot and the few trees scattered around the park are not sufficient to resist the heat. The park is often deserted by the resident during the summer months and we hope that the forest will help reduce the temperature as well as shield the view from the road.








The site of Paul Joly Forest in Marly, France
The pocket forest after 21 months growth

Forest Report: 1 Year

DATE: 13.10.2022

Survival Rate: 97%

Average of Tallest 3 Trees: 125cm

Paul Joly Forest is doing really well, after surviving the harshest summer in decades without any watering. The Seille and the Renaulrupt stream being close to the planting area, the trees were able to access water by capillarity. They did not show any hydric suffering during the year. Growth rate is slower than usual, but overall the situation is very good. This highlights the resilience of the Miyawaki method.

There was a successful day of maintenance conducted by 50 local people in May 2022. The forest is a real part of the community, with grandparents and their grandchildren now returning to the forest to see the trees they planted.


Forest Report: Planting

DATE: 13.10.2021

“The trees that we are going to plant will outlive us and benefit the children of our children. We see this project as an opportunity for the community to rediscover the history of this land and their successive owners, to “feel” the passing of time and raise awareness on our responsibility to protect our environment for the next generations.”

Celine Moguen, Collectif 10,000 Arbres 10,000 Enfants

Forest Design

This photo illustration shows what the forest at Paul Joly will one day look like.


Nestled between housing development and a highway, Paul Joly Forest will:

  • Work as a sound buffer (traffic)
  • Be an air purifier & air cooler
  • Reinforce the identity of the neighborhood and
  • Become a meeting place for young & old.


The city officials are passionate about this project. They did some research in the archives of the city to learn more about the history of the location. At the time, this land was dedicated to market gardening, on an estate that originally belonged to a renowned family at the time, the Ancillon de Jouy family.  Their small "castle" can still be seen a few meters away from the Paul Joly park.

The history of this land can be an opportunity to forge a strong link between the land as it has been handed down to us through the ages, and the land that we want to give to the future generations of the city. These generations will see the forest that is being planted today.

The city officials of Marly were also seduced by the idea of recreating the link between the inhabitants through this participatory plantation, to stir in them the desire to invest for the common good, to teach the youngest some simple ancient gestures that connect us to nature.

The project was originally initiated by a group of citizens formed after the first worldwide climate protests. It was called the “10,000 trees 10,000 children".  Their hope is to inspire other cities nearby Metz to embark on similar projects in the years to come.

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