Leek and bunching onions are among the oldest cultivated allium crops of Eurasia and, due to their small bulb formation, are primarily grown for leaf harvest. Early forms emerged from wild Allium species and were already used and refined in ancient cultures. Over regional cultivation and trade routes, many types developed over time, differing in shape, colour and flavour. Their diversity ranges from strong, long‑shafted leek varieties to tender, early bunching onions with white‑green colouring, as well as particularly robust types.

In subtropical climates, leek and bunching onions grow well year‑round — both in winter and under hotter summer conditions, provided that water supply remains consistent. In temperate regions, almost all of our traditional and historically preserved open‑pollinated varieties perform reliably throughout the year, as some of them are highly winter‑hardy and form uniform, aromatic shafts. Leek and bunching onions show strong ecological adaptability and can be cultivated successfully in many climate zones.