In traditional agricultural societies, plants and trees have had an extensive and recurring presence. In particular, trees with a significant character and a strong community or prophylactic load that, during the spring period will protect the potential harvest. During summer, they can also commemorate a satisfactory harvest, evidenced or materialized in their unique presence. In these contexts, the so-called maypoles (maiatzeko zuhaitzak) or festive trees (tree or poplar of Saint Joan, Donienatxa, etc.) have been, and still are a common practice.
Between dawn and sunrise on St John’s Day, it is customary to place an oak or ash branch decorated with a bunch of herbs and flowers on front doors of houses and hermitages dedicated to the saint. Ears of wheat would also be added to the arrangement in earlier times, and a peeled splinter inserted in the wood of the branch to make a rustic cross. St John’s oak bouquet (sanjuan-haretxa, in Basque) is in point of fact a traditional symbol of the summer solstice.