Spinach is one of the strongest cold-tolerant vegetables in green leafy vegetables. In the winter, the minimum temperature of spinach is about 10 °C, and the open field can completely overwinter. Some varieties with strong cold resistance can withstand short-term low temperatures of 30-40 ° C when there are 4-6 true leaves. Spinach has wide adaptability, the suitable temperature for growth is 15-30 °C, the optimum temperature is 15-20 °C, and the seeds can germinate at 4 °C. The soil in early spring can be sown when the soil is thawed. The suitable temperature for germination is 15-20 °C. When the temperature is higher, the germination rate is lowered. The spinach flowering of spinach is affected by the length of sunshine, and the convulsion is accelerated as the temperature increases and the number of sunshine hours increases. Spinach is not tolerant to drought, and it grows vigorously in a humid environment. The quality is good. When the soil is dry, the growth is slow, the leaves are aging, and the quality is poor. The requirement of spinach for soil is that it can be cultivated except for acidic soil, and other soils can be cultivated, especially in moist and humus-rich sandy loam soil. Spinach is a fast-growing vegetable with high planting density and high yield, so there needs to be sufficient quick-acting nutrient supply during the growing season. Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone Concentrated extraction powder is a plant as raw material, in accordance with the need for the use of the extracted end product, after physicochemical extraction and separation process, directed to obtain and concentrate one or more of the active ingredients in the plant, without changing the structure of its active ingredients and the formation of the product. According to the extraction of plant components, the formation of glycosides, acids, polyphenols, polysaccharides, terpenes, flavonoids, alkaloids, etc.; according to the different traits, can be divided into plant oils, extracts, powders, crystals and so on. Concentrated Extract Powder,Proportional Extract,Extractum,Concentrated Powder Shaanxi Zhongyi Kangjian Biotechnology Co.,Ltd , https://www.zyplantextract.com