Nya träd för stadsmiljö

Sammanfattning: Trees in urban environment are exposed to extreme conditions, foremost the ones that grow in the hard packed soil along our streets. They are also exposed to damaging insects and fungal diseases both local and new ones spreading from South Europe. The global warming with warmer temperatures provides a longer growing season, making it easier for insects and fungus to establish a habitat. Based on these facts new tree species need to be available for future urban plantings.To determine what these trees would be an interview study began. Six people were selected who have experience in the field of urban environment planting. They were divided into two groups, urban planting and production. After the analysis of the interview a list was produced containing 34 suggestions for species suitable for the urban environment. From that list, 12 tree species were narrowed down if they were recommended from more than one person. Five trees were selected; the American Tulip tree, the Obushi Magnolia, the Dawn Redwood, the European Black Pine and the Pin Oak, based on the characters given in the categories: botany, reproducing, suitability, hardiness, pruning, disease resistance and if they would be able to produce in Sweden.The result of the study show there is multiple trees suitable for the future urban environment. The urban tree planters agree it is important to share the risks and to try new species, both domestic and exotic. Exotic tree species meaning those that are native to a foreign country and not in use extensively or not at all in Sweden. The exotic trees that are being used today are ordered from the nursery who buys them from the nurseries in Europe. If the demand increases in Sweden, there is plenty of opportunity for the Swedish nurseries to start a production.