Slender St. John's Wort is fairly rare in the Netherlands. And it is getting even scarcer. Because its most preferred habitats are disappearing, such as coppice woods and damp dunes, it is having a hard time surviving. Dunes used to be drained for drinking water, but new management policies whereby more water is being retained in the dunes may help this plant. It is found mostly in the Veluwe, South-Limburg. It was a big surprise when this plant was found on Texel in the 1970's. So far as anyone knows, it arrived here spontaneously.