Children's vegetables will freeze to death if the minimum temperature is below 0 degrees Celsius. Children's vegetables have poor cold tolerance. If the temperature is lower than 0℃ for a long time in the late stage of expansion, the hypertrophy of stems, buds and leaves are prone to freezing injury. Early bolting is easy to occur under the conditions of early sowing, warm winter and long sunshine.

Seeds can germinate at 8~ 10℃, and the optimum germination temperature is 22~25℃. The seedling stage is 60~70 days, and the optimum growth temperature is about 20℃.

Features are as follows

Biennial vegetables like warm, cool and moist, with strong growth potential. The total number of leaves is about 30, and axillary buds overlap the stem in a pagoda shape. Seeds can germinate at 8 ~ 10℃, and the optimum germination temperature is 22 ~ 25℃. The seedling stage is 60 ~ 70 days, and the optimum growth temperature is about 20℃. The expansion period of fleshy stems is about 120 days, and the occurrence and expansion of fleshy lateral buds takes about 1 10 days.

Expansion requires strict temperature. After sowing in autumn, when the temperature dropped to about 65438 07℃, the succulent stems began to swell. When the average temperature drops to about 15℃, the lateral buds on succulent stems begin to germinate and swell, and the optimum temperature for axillary buds to swell is 10 ~ 15℃.