| 1953 | Idea for the netzwork at the meeting of the Commission for Agricultural Meteorology of the World Meteorological Organization |
| Development of the concept by Fritz Schnelle (DWD) and Erik Volkert (University of Göttingen) and establishment of the mother garden for vegetative propagation in Großhansdorf, Germany | |
| 1957 | Official foundation of the IPG network |
| 1959 | First phenological observation in Offenbach, Germany |
| seit 2011 | Propagation of the plants in Grafrath, Germany (LWF/AELF) |
| 2024 | Integration of the GPM programme into the IPG network |
Scientific coordination
| 1953-1973 | Fritz Schnelle (DWD) and Erik Volkert (University of Göttingen) |
| 1973-1977 | Albert Baumgartner (Institute for Biometeorology und Applied Biometeorology, Technical University Munich) |
| 1978-1995 | Helmuth Lieth (University of Osnabrück); development of the first database by Erika Freitag (DWD) |
| 1996-2023 | Prof. Dr. Frank-M. Chmielewski, supported by Susanne Morryson and Stefan Heider (Institute of Agricultural and Horticultural Sciences, Humboldt University of Berlin) |
| since 2023 | Prof. Dr. Susanne Jochner-Oette, supported by Johanna Jetschni (Physical Geography / Lanscape Ecology and Sustainable Ecosystem Development, KU Eichstätt-Ingolstadt) |
Sources: Chmielewski et al. 2013, Renner & Chmielewski 2022