Can you grow cauliflower in the open field when the temperature drops below zero?

Answer: Chang Zongtang, a consultant from the Yangling Old Association for Science and Technology and a researcher at Northwest A&F University, said: Cauliflower is a semi-cold-tolerant vegetable. It is a general variety that is neither tolerant to high temperature, drought, nor frost. Cauliflower growth temperature is relatively narrow, and the requirements for environmental conditions in cultivation are relatively strict. The vegetative growth temperature of cauliflower can be between 8~24℃, and the suitable temperature for curd growth is between 15~18℃. The growth of flower bulbs is slow below 10℃. When the temperature is higher than 25℃, the shortening of flower stalks and flowering branches are rapid. Elongation, the resulting curd is small and loose, reducing yield and quality. The suitable temperature for the growth of cauliflower bulbs is relatively narrow. Only by arranging the growth time of the bulbs within the suitable temperature range according to the growth period of the variety, can the cultivation achieve the ideal harvest. Cauliflower will affect the growth of leaf bulbs at temperatures of -5°C and -6°C, and when the temperature drops suddenly, a large amount of anthocyanins are produced in the flower bulb, which makes the flower bulb purple.

However, some varieties can survive the winter in the open field without any protection at -15°C. If a vegetable grower wants to grow cauliflower in the open field, he needs to be cautious. You can try planting first and then plant it on a large scale after success.

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