Walnut trees grow vigorously but enter the fruiting period relatively late. Generally, it takes 7-10 years for seedlings planted from seed to enter the fruiting period, and 3-5 years for grafted seedlings. In walnut-growing areas, especially on flat land along mountains, due to the thick and fertile soil

In fruit tree production, Gibberellic Acid (GA3) is widely used to break the dormancy of seeds or buds in certain tree species, thereby promoting rapid germination and shortening seed treatment time to advance germination and increase germination rate.

Indole-3-Butyric Acid (IBA) and 1-Naphthyl Acetic Acid (NAA) This combination is commonly used for cuttings or transplanted crops. For example, a 5% IBA·NAA soluble powder (containing 2.5% IBA and 2.5% NAA) can activate cell differentiation and promote root primordia formation

Zeatin promotes cell division and can affect other stages of the cell cycle. Its functions include inhibiting chlorophyll and protein degradation, slowing respiration, maintaining cell vitality, delaying plant senescence, reversing toxic effects on leaves, inhibiting root formation, and promoting shoot formation at high concentrations.