John: ...if we get warmer wheater, we perhaps will have "spring" at the end of March. But, they have "promised" us up to 15cm of snow next week...and temps between -5 to -10.

Stockholm is "always" about 4 weeks later than for example Malmö or Copenhagen. Stockholm, as many cities, have many growing zones, depending on how close you live to water and so on.

/Patrik
Stockholm
zone 3 (4)