Title: Green-Up Protocol
Grade Level: All
Source: GLOBE

Curriculum Materials:
Protocol (PDF)
Data Sheets
Field Guides
GPS Guides


  • Observe when buds burst open at the beginning of the growing season
  • Observe how leaves grow to maturity
  • Identify tree species native to your area
  • Examine relationships among budburst, leaf growth and climate factors
  • Predict the timing of budburst for upcoming seasons
  • Compare the rate of leaf growth of different plant species
  • Communicate project results with other GLOBE schools
  • Collaborate with other GLOBE schools (within your country or other countries)
  • Share observations by submitting data to the GLOBE archive


  • Green-Up Data Sheet
  • Grass Green-Up Field Guide and/or Tree and Shrub Green-Up Field Guide
  • Tree and Shrub Green-Up and Green-Down
  • Site Selection Field Guide and/or Grass
  • Green-Up and Green-Down Site Selection Field Guide
  • Green-Up and Green-Down Site Deļ¬nition Sheet
  • Ruler with mm marks
  • Flagging tape, 1 label per student
  • Pencil or pen
  • Dichotomous keys and/or other local species guides
  • Compass
  • Camera
  • Calculators (optional)

Students monitor budburst and growth of leaves of selected trees, shrubs, or grasses

All the resources required (data sheets, guides, etc.) are available on the GLOBE site. Data collected by GLOBE participants is added to the general database for collective analysis. Educators interested in participating in GLOBE need to attend special workshops (schedule and registration available through the website) relating to the activity in question.

  • Whether the data are entered in the GLOBE database or not, a possible extension activity, if resources allow, would be communicating with schools in different parts of the world, both on the same latitude and not, to compare seasonal change data as an illustration of global climate variability.

State Framework relevance:in progress