Detailed Explanation of Sand Storage Treatment for Licorice Seeds

If a large quantity of seeds is used, sand storage treatment is mostly adopted. The method is: carry out the treatment about 2 months before sowing. First, soak the licorice seeds in 60°C warm water for 4~6 hours, stirring several times during soaking. After removing them, drain them, and mix them evenly with clean fine river sand at 5 times the volume of the seeds. The humidity of the river sand should be such that when squeezed in the hand, water appears but does not drip. Then put the evenly mixed seeds into a wooden box, pack the surrounding area tightly with wet sand that has not been mixed with seeds, and cover the top with a 3~5 cm thick layer of moist fine river sand. Finally, place the seed box into a prepared pit, pack the surrounding area with moist soil, and cover the top of the pit with a wet straw curtain. The sand storage pit should be chosen in a high, dry, wind-sheltered, and shaded place, and water must not accumulate in the pit. During storage, check the humidity frequently. If it is too dry, take out the seed box, sprinkle water and mix well, and store it again once the humidity reaches a suitable level. If there is too much moisture, it can be solved by air-drying. With this method, the seeds can be sown after 2 months, which is suitable for autumn sowing.