A traditional forest plant prevents yellow onions from sprouting and rottingStoring yellow onions in city apartments or summer houses until spring is challenging—warmth leads to drying and sprouting, while dampness triggers rot. To keep the harvest firm and juicy through April without refrigeration, gardeners can use a traditional method involving dried eagle fern (Pteridium aquilinum) as a natural preservative. The Role of Eagle FernUsing dried eagle fern leaves provides a biological shield against bacteria and fungi due to the plant's phytoncide properties. Andrey Zorin, plant protection specialist: "Fern leaves act as a biological barrier. Collect fern leaves in the forest during dry weather; they must be completely brown and brittle.