2024 Spring Tree Campaign

Colorful picture of trees, grass and flowers in a forest.


Trees are beautiful. They wake up again each spring. Observe your tree from buds to leaves and share your measurements in the GLOBE database. Find out how important is the role of trees in the carbon cycle and in cooling our cities.


Webinar "Our Spring with Trees"Get inspired by student presentations and videos.

Join the final campaign meeting "Our Spring with Trees" on Tuesday, June 4, at 1 pm CEST





What can you expect?

  • 4 activities guiding you through Green-up observations
  • 4 activities for everyone interested in the role of trees in the global carbon cycle
  • Tree-height measurement activity
  • Activity focused on the role of trees in cooling our cities
  • Sharing of results and pictures at the campaign discussion forum
  • 3 webinars where you will learn from scientists about phenology and how trees cool cities and get inspiration from other schools.
  • Opportunity to cooperate with a partner school(s) from your country or abroad
  • Certificates and virtual badges for active schools


The Spring Tree (Phenology) Campaign is part of the worldwide GLOBE Year of Climate and Carbon Campaign.

If you have any questions or ideas, e-mail lenka.kleger@terezanet.cz.


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.

Images of seven species of trees and fruit: sour cherry, small-leaved lime, hazel, pedunculate oak, silver birch, beech and fig.

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

GLOBE program ruler measuring a leaf.

You can also measure your tree height with the activity: How tall is my tree?

Explore how your tree affects the microclimate in its surroundings and how trees help us to cool the urban environment: Air-conditioned by Trees




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.  A picture of your tree without leaves
  2.  The date of budburst
  3.  A picture of your tree with leaves





2024 Spring Collaboration group

Four students outside, examining a branch on a tree.

Besides new knowledge about phenology, your students will also learn to communicate with international students. The essential skill when living in the 21st century.

What can you do within the collaboration group?

  • Regularly exchange data and pictures by e-mail
  • Share your results via Padlet, Wakelet, Bookcreator or other online tools
  • Plan a virtual meeting and discuss your experience and results
  • Plan a phenology project together

The registration for the 2024 Spring Collaboration group was open by February 18.

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