There are skills in topdressing garlic.

Topdressing for autumn sowing garlic should be applied once at the seedling stage and before overwintering, and the fertilizer can be used with human manure or chemical fertilizer. Generally, 1000-2500 kg of mature human feces and urine per mu, or 15-20 kg of ammonium sulfate, or 7-9 kg of urea, should be applied with water. If the garlic seedlings grow vigorously, you can avoid topdressing to prevent the seedlings from becoming too prosperous before winter. When overwintering, it is necessary to cover wheat straw or rice straw, sprinkle soil and miscellaneous fertilizer, pond mud, etc., applying 5000kg to 7000kg per mu, which can make the plant bolting early in the second year, the cloves of garlic are big and the garlic is heavy. After the temperature rises in spring, in order to meet the demand for nutrients in the spring stage, spring fertilizer should be applied in time, and human feces, urine or chemical fertilizer can be applied. When bolting, apply ammonium sulfate 20kg / mu, or urea 9kg / mu. One month after the application of bolting fertilizer, the scale buds of garlic entered the prosperous stage and needed a large amount of nourishment. at this time, quick-acting fertilizer should be applied once, and pig manure urine 3000kg / mu, or ammonium sulfate 18kg / mu, or urea 8kg / mu could be applied, which could promote garlic early bolting and improve the yield and quality of garlic bolting and garlic head. When applying fertilizer to garlic, we should pay attention to the fertilization in two key periods, one is to promote seedling fertilizer to promote the growth of garlic leaves, and the other is to promote the expansion of garlic bulb.