Welcome to plant trees with ENO !

Environment Online ENO – a global school and community network for sustainable development, invites your school, group or community to participate in international tree planting event! The next tree planting day will take place 22 May 2021. 

Since the launch in 2000, over 10 000 schools in 157 countries have taken part and made concrete deeds for the environment. We have planted trees since 2004 around two annual days standing together with UN; for International Day for Biological Diversity 22 May and for International Day of Peace 21 September. And of course you can participate and plant at any day throughout the year depending on a suitable season for planting in your country.

Want to participate?

Please read these quick steps:


  1. Preparations: Choose a date, local tree species and suitable place for planting. Celebrate and share your trees with the world! Find detailed instructions here
  2. During the event: Share your event by using hastags such as #enotreeplanting  #enotreeday #enoprogramme
  3. Report your event details here . You will get your certificate of participation by reporting your event details
  4. Afterwards: Take care of your trees after planting !

Short history of ENO Tree Planting Days

ENO started in 2000, The first four years were with mainly online activities. As many schools had problems with Internet we needed some activities offline. Then the idea of tree planting arose in 2004. The international day for peace was chosen as the first ENO Tree Planting Day and since then, every year ENO schools plant trees for peace around 21 September.

On 21st of September 2004, ENO tree planting gathered 50 schools in 30 countries. Tree planting made ENO more popular and next year over 200 schools joined.  Afterwards, another ENO tree planting day was organised around 22 May, the international day for biological diversity. Until the end of 2018, ENO Tree Planting Day has been organised 25 times.

The occurrance of ENO Tree Planting Days 2004 – 2018:

20 September 2013
21 September 2004, 2005, 2006, 2007, 2009, 2010, 2011, 2012, 2015, 2017,2018
22 September 2008, 2014

8 May 2013
18 May 2018
20 May 2011
21 May 2010
22 May 2009, 2012 2014, 2015, 2016, 2017