All over Europe, folk belief gave plants special powers. They protected house and livestock, brought love, warded off thunderstorms and evil forces. These customs are often very old and were later linked to Christian feasts.
A fine example from the Low Countries is the kruidwis, the herb bundle. On the Feast of the Assumption, 15 August, bundles of herbs and grains are blessed in Dutch and Belgian Limburg. The bundle, with mugwort and wormwood among other things, was kept at home and thrown on the fire during thunderstorms, as protection against lightning.
Midsummer night, St John’s Eve on 24 June, was also a time for herbs. St John’s wort was picked and hung above the door against misfortune. In the nineteenth century folklorists collected such customs, and in the twentieth century a modern herbal magic arose, especially in pagan movements.