Select varieties that are more resistant to cold, early winter, late bolting, strong growth potential, and good quality, suitable for spring sowing: such as big leaf celery, Jinnan real celery, milky white celery, crisp glass, and Italian celery. In general, Chinese celery twitches early, and western celery twitches are late.
Timely sowing: In terms of varieties, the critical sowing period for celery twitching is after the torrential rain, the pods sown before the valley rain, and the safe spring sowing period after the Ching Ming. Celery temperature above 15 °C, colonization later, there is no convulsions phenomenon; if the colonization is too early, the convulsions earlier, seedling temperature below 15 °C, the lower the temperature, regardless of colonization sooner or later, the convulsions rate are high.
Cultivate strong seedlings: During the seedling raising period, especially after 3-4 leaves of real leaves, try to control the temperature, reduce the low temperature time below 10°C, supply suitable nitrogen fertilizer and moisture conditions, delay flower bud differentiation, and promote multi-differentiation leaves. Therefore, after sowing, the seedlings should be covered with a membrane or a small arch awning, shading nets should be covered in the evening. After emergence, during the day, pay attention to ventilation and cooling, not more than 25 °C, to prevent the occurrence of high seedlings and diseases, the best not less than 8 °C at night.
Spraying Growth Regulators: Spraying growth spots with 4000-8000 mg/L of CCC solution can inhibit bolting and flowering. It can also be sprayed with 50-100 mg/litre solution.
Timely harvesting: Under normal circumstances, the spring celery does not enter the erect stage of the heart and leaves, the growth point has differentiated flower buds, can only rely on the outer leaves of the leggy and the newly emerged tender leeks for the product, once the whole plant cuts at the tenth centimeter high under.
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