Onions prefer sunlight, it belongs to the light requirements of the longer crops, onions in each stage of growth to a large amount of water, but not to cause waterlogging, onion seeds and bulbs as long as the temperature conditions of 3 degrees -5 degrees can be slow germination, 12-20 degrees is very suitable for the growth of seedlings, more in the fall in September-October sowing, the Yellow River and Huaihuai region in early September.

Onion growing environment and conditions

Onion was originally distributed in western Asia, is now widely planted around the world, China's north and south are planted, mainly in Shandong Shanxian, Pindu, Yutai, Jinxiang, Yunnan Yuanmou, Dongchuan, Xichang, Sichuan, Jiangsu, Jiuquan, Gansu, Wuwei and other places.

Onion growing conditions

Onion is more like sunlight, it belongs to the light requirements of the crop is relatively long, onion in each stage of growth to a large amount of water, such as germination, seedling, growth period, bulb expansion period, the need to maintain the soil moist, but do not cause waterlogging.

Onion growth temperature

1, onion can be regarded as a vegetable inside the ability to adapt better, onion seeds and bulbs as long as the temperature conditions in 3 degrees -5 degrees can be slow germination, 12 degrees -20 degrees is very suitable for the growth of onion seedlings.

2, the best growth temperature of onion leaves in 18 degrees -20 degrees, onion bulbs most suitable for the growth of the temperature in 20 degrees -26 degrees, the growth of better seedlings, can be in 6 degrees -7 degrees of temperature survival.

3, onion bulb expansion stage requires high temperature, at 21 degrees - 28 degrees such temperature is more interested in the growth of bulbs, must pay attention to the bulb expansion stage temperature can not be lower than 15 degrees below, or the bulb will stop expanding, but also pay attention to the temperature is too high will make the onion growth degradation, into the dormant.

The growth process of onion

The growth process of onion has three main, will be planted onion, maintain the soil slightly moist, about three days time will grow roots, planted on the ninth day will produce green shoots, green shoots gradually mature, will produce more leaves.

Onion planting time and method

Onions are mostly planted by sowing, the best planting time is in the fall of September-October, in which the best sowing time in the Huanghuai region is early September, in addition, in planting onions, we should pay attention to the selection of the most suitable for the local environment of the cultivars, while seedling and field management is also very important.