This is shown by the Pre-Summer Survey, carried out by the Swedish University of Agricultural Sciences and the Swedish Botanical Society on National Day each year.
The results show that flowering has reached a record far north this year compared with the past. A clear sign is the lilac, which 100–150 years ago only managed to bloom in the lower reaches of Skåne and Halland by this time. This year it has already bloomed all over Skåne and on the southern east coast.
Researchers at SLU say this is a clear signal of change. Although year-to-year variation can be large, long-term trends are crucial, according to the researchers.
11,000 reports on the flowering of some of the most common early-summer flowers were included in this year's survey.
