Celery Southern region, can be cultivated throughout the year, but to spring, fall and winter planting the best. Summer heat, slow growth, poor quality. In the northern region, spring and fall sowing is appropriate. Celery can be direct-directed, but also can be transplanted from seedlings. Summer sowing, the seeds should be treated, the method is, first of all, the seeds with 20-25 ℃ warm water soaked 4-6 hours, fished out and wrapped in gauze, hanging to the bottom of the well over the water, or put into the refrigerator freezer, 3-4 days there are most of the whitening can be sown. Generally sowing is used. After sowing, cover the shade net, and remove the shade net in time after the emergence of seedlings. Seedlings 15-18 cm high, can be planted. In the balcony, rooftop, living room or courtyard planting celery, optional cultivation containers are flower pots, wooden pots, professional cultivation boxes, foam boxes, etc., and the depth of cultivation is 15-20 cm. The growing period of celery is relatively long, and it takes about 3 months from sowing to harvesting, and it can be pulled and harvested in batches when the plant is 40-50 centimeters tall. Celery likes cool climate, cold, shade, heat and drought resistant. The suitable temperature for growth is 15-20 ℃, 26 ℃ or more poor growth, poor quality. Celery is shade tolerant, and needs to be covered with shade net before seedling emergence, and needs sufficient light in the later stage. Celery belongs to shallow root vegetables, weak drought tolerance, evaporation and large, need moist soil and air conditions. Celery on the soil requirements are more strict, need fertile, loose, good aeration of the soil, the whole growing period should be timely irrigation 'fertilizer, in order to meet the needs of its growth. Summer cultivation, due to positive evaporation, watering every morning and evening, fertilizer to nitrogen fertilizer. Light is too strong to have a shade net to block the shade.