2021 My Tree in Spring


Trees are beautiful. They wake up again each spring. Observe your tree from buds to leaves and upload your measurements into the GLOBE database.

Find out how important is the role of trees in the carbon cycle.


The spring campaign ran from March to June with nearly 200 participating school teams from 22 countries: 

Belgium, Croatia, Czech Republic, Estonia, Greece, Hungary, Ireland, Israel, Italy, Kyrgyz Republic, Lithuania, Malta, Nederland, North Macedonia, Poland, Slovakia, Spain, Sweden, Switzerland, Turkey, Ukraine, USA

The autumn campaign will follow starting in September. Closer information and registration will be available on this website at the end of August.


What can you expect?

  • 5 activities guiding you through Green-up observations
  • 4 activities for everyone who is interested in the role of trees in the global carbon cycle
  • Tree-height measurement activity
  • Sharing of results and pictures at the campaign discussion forum
  • 4 webinars, where you learn about phenology, meet scientists and get inspired by other schools
  • Opportunity to cooperate with a partner school (from your country or abroad)
  • Certificates and virtual badges for active schools


The COVID situation may make it difficult to visit your tree. The activities contain ideas on how to use them for distance education.

If you have any question or ideas, please let us know.


How to start?


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


What else can you do?


  • Take pictures with GrowApp and make a time-lapse video.
  • Share your results and pictures with other schools at the discussion forum.
  • Get trained in Green-up observations - protocol e-training
  • Get inspired by the research and activities of other students.
  • Connect to teachers and students from other countries within the School Collaboration group.
  • Learn more about the role of trees in the carbon cycle. Read more.


„During observations, the students tend to be more perceptive as they were interested in how the weather temperature affected the budburst. They’ve found out which tree burst earliest and which latest, which tree’s leaves grew fastest during the same weather conditions.“

Rasa Gaidiene, Anyksciai distr. Troskunai Kazys Inciura Gymnasium, Lithuania


Activities for students

  • Activity 1: My Tree + carbon activity: Tree Growth Game
  • Activity 2: Look at the Buds + Data Sheet + Carbon Around Me
  • Activity 3: First Leaves + carbon activity: Carbon in my tree
  • Activity 4: My Green Up Data + Data Upload Guide + carbon activity: The Case of Missing Carbon
  • Activity 5: Green Color Scale

You can also try to measure your tree height: How tall is my tree?





Schools that register can earn virtual badges and get them displayed on the school profile.

Data entry – you will earn this badge if you upload data for at least one tree into the GLOBE database, following Activity 4.

Collaboration – you will earn this badge if you share at the discussion forum or send by e-mail the following:

  1.  Picture of your tree without leaves
  2.  Date of budburst
  3.  Picture of your tree with leaves




2020 Spring Collaboration group

Why join the Collaboration Group?

Apart from new knowledge about phenology, your students will also learn to communicate with international students. This skill 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 Skype call and discuss your experience and results
  • plan a phenology project together

For more information about the Collaboration Group contact Lenka Kleger at lenka.kleger@terezanet.cz.