White mulberry Morus alba L. is a tree from the Moraceae family, which originated in East Asia and came to Europe in the mid-12th century. The greatest level of interest in the cultivation of white mulberry was observed in the 18th and 19th century and the oldest preserved mulberry alleys in Fore-Pomerania and Western Pomerania originate from this period. The greatest accomplishments in promoting this species in Prussia should be attributed to German Emperor Frederick II. In the last century, the interest in mulberry has significantly declined and, due to its average ornamental qualities, it is less and less common in green areas. The longest national white mulberry alley, consisting of 31 specimens, stretches over 800 meters.