Sweden was a great military power during the seventeenth century. Many castles were built and many became palatial homes in the eighteenth and nineteenth centuries. Swedish castles are often well positioned near to the sea or a lake, which makes them a joy to visit. Drottningholm Palace is the summer residence of the Swedish Royal family and the garden is a fine example of the baroque style.
Although Sweden has a cool climate, many flowering perennials flourish in the south and centre of the country. We are not aware of any specialist tours but it is an easy country to visit with English very widely spoken.
See list of gardens to visit in Sweden