Abstract: To explore the suitable sowing date of garlic in eastern Henan, and provide a basis for the local garlic standardized production, the experiment was conducted by using‘Zhongmou garlic’as material and eighteen sowing dates were designed. The emergence rate, stem diameter, plant height, dead seedling rate, bolting rate, secondary growth rate, the yield of garlic shoot and the yield of garlic bolt were measured so as to study the effects of different sowing dates on the growth and yield of garlic. The results showed that different sowing dates had different effects on the yield and quality of garlic. Sowing too early, the garlic sprouted slowly, and the growth of a single plant was good, the stem diameter was thick, the plant grew high, but the dead seedling rate was high, and the pests were serious at the seedling stage, so that the overall yield was not high. Sowing too late, the garlic sprouted fast, and the emergence rate was high, the plant grew strong, but the suitable growth period was short, the secondary growth rate was high, and the overall yield was low. Taken together, the optimum sowing date for garlic was about October 4 in eastern Henan, the yields of garlic bolt and garlic shoot were high, and the comprehensive traits were excellent, hence it was the suitable sowing stage for the standardized production of garlic in eastern Henan.