Défi850.org – From grass to flowers: let’s rise to the challenge
Take the challenge: commit to transforming a patch of grass into a biodiversity garden. Every square meter counts — for the bees, the birds, and the future of Nuns’ Island.
🌸 About Défi850
Défi850 is a citizen-led movement launched on Nuns’ Island to transform 850 square meters of lawns and flowerbeds into biodiversity gardens.
We believe it’s possible to have spaces for children and spaces for nature — places where play, joy, and wildlife coexist in harmony. While children will soon enjoy a new field to play and have fun, we’ll give back an equivalent space elsewhere on the island to biodiversity.
We are 21,000 residents on the island, surrounded by millions of insects, birds, butterflies, and small creatures who share this territory with us. By planting native flowers, we offer them food, shelter, and living corridors — and in return, we rediscover beauty: hummingbirds passing by, butterflies dancing, and birdsong filling our days.
Défi850 is an invitation to create a place where nature and community grow side by side. Every square meter counts — for them, for us, and for the future we want to offer our children.
Let’s work together to make this happen
Expert Guidance
Join us by pledging to transform your lawn into a living garden — we’ll help you every step of the way.
5 Years
Our goal is to reach 850 m² over five years. Access our upcoming guides and workshops to choose the right native plants and plan your space.
For everyone
From families to schools and local businesses — everyone can take part. Join our workshops and discover how easy and rewarding gardening for biodiversity can be.
🌿 Get involved today
Indicate how many square meters of grass you’d like to transform into a biodiversity garden. Each commitment brings us closer to our goal of 850 m² for nature.