What should be noted when sowing celery in summer?
What should be noted when sowing celery in summer? Please give guidance. Summer temperatures are high, which is not conducive to celery sprouting, so low-temperature sprouting must be carried out. First soak the seeds in clean water for half an hour, remove and rinse them clean, wrap them in wet gauze, hang them in a water well 20 cm above the water surface or place them in a refrigerator at about 4°C, take them out and rinse 1...
What should be noted when sowing celery in summer? Please give guidanceSummer temperatures are high, which is not conducive to celery sprouting, so low-temperature sprouting must be carried out. First soak the seeds in clean water for half an hour, remove and rinse them clean, wrap them in wet gauze, hang them in a water well 20 cm above the water surface or place them in a refrigerator at about 4°C, take them out and rinse 1-2 times a day to keep the seeds moist. After 4-5 days, when some seeds begin to sprout, they can be broadcast sown into the seedbed for raising seedlings.
Summer-sown celery takes 35-45 days from sowing to transplanting. During this period temperatures are high and there are many rainstorms. A flat-topped shade shed should be built, with the top of the shed 1.5 m from the bed surface, covered with straw and the like; a small arched shed covered with shade netting can also be used.
When the celery seedlings grow to 10-13 cm tall, transplant them, with a plant spacing of 10 cm and a row spacing of 15 cm. After transplanting, build a shed and add shade netting to lower the temperature, so that the celery grows vigorously and bolting is prevented.
Celery has a long growing period and a large amount of growth, so fertilizer and water need to be supplemented in time. In addition to applying sufficient farmyard manure as base fertilizer, add 50 kg of compound fertilizer with a high potassium content per mu. Afterwards, according to the growth situation, apply manure water as a top dressing, and a small amount of urea can be added to the manure water to improve the quality of the celery.
In the late growth stage of celery, the population density is high and the field humidity is high, making pests and diseases likely to occur, especially aphids and gray leaf spot, which occur rather severely. For aphids, a 3000-fold dilution of Yibianjing can be sprayed for control, and for gray leaf spot, a 800-fold dilution of 75% thiophanate-methyl powder can be sprayed for control.
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