Sources & attribution
Flowering observations — Germany
Quelle: Deutscher Wetterdienst (DWD Open Data, phenology, annual reporters; licence CC BY 4.0 / GeoNutzV). Datenbasis: Deutscher Wetterdienst, eigene Elemente ergänzt — we aggregated station data to city medians and modelled them. opendata.dwd.de
Flowering observations — Sweden
Swedish National Phenology Network (SNPN) / Swedish University of Agricultural Sciences (SLU), Naturens kalender: Växtkalendern 2008–2024, CC0 1.0, DOI 10.5878/h4ez-wy68. We publish only aggregated city medians, no observer locations.
Temperature
Contains modified Copernicus Climate Change Service information 2026 (ERA5-Land reanalysis, ECMWF / Copernicus, CC BY 4.0). Daily values retrieved through Open-Meteo.com (CC BY 4.0). Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.
Map outlines
Country outlines: Natural Earth (public domain), simplified.
Limitations
- Everything on this site is a model estimate built from volunteer observations. It is not an official forecast of DWD, SLU, Copernicus or anyone else, and none of them endorses BloomPing.
- Observations are of single observers’ plants; urban heat, altitude, cultivar and shade shift dates by days.
- Swedish series are small (2–4 observers per city-year); some flowers have almost no Swedish data and are marked “approximate”.
- This is alpha. See How it works for measured errors.