The walnut tree (Juglans regia) is a large tree, considered one of the most important crop plants, due to its various uses (in the food industry, wood industry, but also as a decorative plant). It has a strong trunk with smooth, grey bark. The leaves are elliptical, large, and the fruit is a spherical drupe. It forms two types of flowers: female and male, which may bloom simultaneously or at different intervals. For good fruiting, 3-4 different varieties are planted in the orchard, which flowers at the same time.