The data have been extracted from the Urban Audit database and joined with the corresponding Urban Audit cities shapefile. The reference year is 2004, where 2004 data are not available, data from 2001 are used (CZ, GR, LT, HU, NL, SI, partially BE). After joining the statistical with the geographic data the information is mapped as coloured dots.
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Be careful when buying for your garden. People are one of the main introducers of invasive species, especially flora. Many of the invasive species have been introduced for ornamental purposes. Do put an extra effort in finding out whether the plant you want is native to your environment.
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