There are several reasons why garlic seedlings are yellow, the first point is insufficient light, garlic seedlings need sufficient sunlight for normal growth, long-term exposure to insufficient light, will make the garlic seedling growth is not good, yellow leaves; the second point is insufficient nutrients, insufficient fertilizer at the growth stage, will lead to a lack of potassium, nitrogen, magnesium and other elements, which causes yellow leaves; the third point is improper watering, lack of water or too much water will also lead to yellow garlic seedlings; The fourth point is soil discomfort, soil crusting or sticky heavy will cause garlic seedlings yellowing.