My Tree in Autumn 

In autumn, the trees shine with many shades of yellow and red as they prepare for the winter sleep. Their leaves gradually turn colour and fall down in a process called green-down. 
Let's watch the beauty of autumn change together!


The 2021 Autumn campaign will start in September. To join, please register by September 8th.



Schools registered for the campaign received 3 learning activities for students and regular newsletters with invitations to webinars. They also had the opportunity to earn a GLOBE certificate and be part of the lively campaign community! For information about the campaign, please write to lenka.kleger@terezanet.cz. 


You are invited to join the opening webinar of the autumn campaign All you need to know about the Autumn Campaign on Thursday, September 16th @ 3 pm CET on ZOOM.  The webinar will provide an introduction to the Autumn campaign activities resources and schedule. Zuzana Lhotakova, a scientist from Charles University will present new carbon activity and explain "Why Leaves Lose Weight" in autumn. There will also be plenty of time for your questions. To join the webinar, please register here.

Select one of the 7 species (Hazel, Fig, Lime, Oak, Cherry, Birch, Beech) that GLOBE students around Europe follow in autumn.


What else can you do?

  • Research how the autumn change of trees relates to weather.
  • Find out, how tall your tree is - try the tree height activity.
  • Join webinars organised in cooperation with scientists.
  • Take pictures with GrowApp and make a time-lapse video.
  • Share your results and pictures with other schools at the discussion forum.
  • Get inspired by the research and activities of other students.
  • Connect to teachers and students from other countries within the School Collaboration group.
  • Read the article "Why do the leaves change color?" and learn why and how the autumn change of trees happen.

The benefits are multiple for the students such as observing nature and learning to be patient. They analyse the results, make a hypothesis and give the conclusion in the end which is the basis for the scientific way of thinking.

Ankica Veseljić, OS Banija, Croatia

Activities for students

Additional activities

To observe and record your tree colour change (activities 2 and 3) you will need the GLOBE Plant Color Guide. If you don’t have the Guide, please contact your GLOBE country coordinator.

Do you want to read more about GLOBE green down observations? Download the Green down protocol, Field guide and Data Sheet from the Download materials tab.

2020 Autumn Collaboration group

Why join the Collaboration Group?

Apart from new knowledge about phenology, your students will also learn to communicate with international students. Skill, which is essential when living in the 21st century.

What can you do within the collaboration group?

  • regularly exchange data and pictures by e-mail
  • plan a call and discuss your experience and results
  • plan a student research project together

How to join?

Registration for the collaboration group is part of the campaign registration. If you need any further information, please write to lenka.kleger@terezanet.cz.   



Pictures by: Veliko Karachiviev on Unsplash, GLOBE School ZS Trebic, Czech Republic