Seeds usually germinate after a few days.

It usually germinates after three days. But it depends on three elements of seed germination. Are temperature, water and air at the same time? With the above three conditions, there must be a complete living embryo. Under this condition, it germinates in three days, but if it is planted in the soil, it will take four or five days to be unearthed.

Germination stage: water fully, and the soil moisture content is above 80%, so as to ensure the rapid and even emergence of seedlings. Seedling stage: the root system is shallow, but the supply must be guaranteed, the soil moisture content is about 60%, the principle of less irrigation and more irrigation should be mastered, and the seedlings should be squatted before the belly is broken and the roots should be straightened. Leaf-growing period: during this period, the water demand is large, and moderate irrigation is needed, but the water should be properly controlled in the later period to prevent the leaves from growing white and affecting the growth of fleshy roots. Root growth period: water should be fully and evenly to prevent root cracking, and the soil humidity should be kept at 70~80% and the air humidity at 80~90%. Water is needed until the later growth stage to prevent hollowing out.

White radish is a semi-cold-tolerant vegetable, which likes mild and cool climate with large temperature difference. Seeds can germinate at 2~3℃, and the suitable temperature for germination is 20~25℃. The seedling stage can tolerate high temperature of about 25℃ and short-term low temperature of 2 ~ 3℃, and the suitable temperature for leaf growth is 15~20℃. The optimum ground temperature for fleshy root expansion is 13~ 18℃.

Extended data

Although white radish has deep roots, it has large leaves and is not drought-tolerant. The suitable soil humidity is 65%~80% of the maximum water holding capacity, and the air humidity is 8%~90%. Too much soil moisture and insufficient air affect the absorption and expansion of fleshy roots, and the epidermis is rough. Uneven water supply can also easily lead to cracking of fleshy roots.

Sandy soil with rich humus, deep soil layer, good drainage and loose ventilation is the best. The optimum pH value of soil is 53~7.0. Potassium is the most absorbed element in the whole growth period of white radish, followed by phosphorus.

White radish requires sufficient light, strong photosynthesis, more substance accumulation, rapid expansion of fleshy roots and high yield. Insufficient light, less carbohydrate accumulation, slow expansion of fleshy roots, low yield and poor quality.

Baidu Encyclopedia-White Radish (Root Vegetable)