How to raise large scallions culture methods and matters needing attention

Large scallions must be strange to many people, it is a relatively poor common variety of flowers in life, it blossoms very beautiful, the flowers are spherical, often seen in purple, the ornamental value is very high, so it attracts a lot of people's breeding. However, we should not be blind before breeding, and we still need to master some skills.

How to raise green onions

1. Large scallions are planted after autumn. Those whose bulbs are more than 3 cm can blossom after planting, while those less than 3 cm need to be cultivated for one year before they can blossom. The bulb proliferation rate of large flowers and onions prefers cool and sunny environment, which requires loose and fertile sandy soil and avoid stagnant water. It is suitable for cultivation in the north of China.

2. For open field cultivation of scallions, sandy soil with low groundwater level, good drainage, loose and fertile soil should be selected as cultivation land. the time of planting bulbs should be from mid-late September to early October, and the row spacing is 20 × 30 cm. The depth of planting is that the thickness of the overlying soil on the bulb is 2 / 3 times that of the fresh stem.

3. After planting, scallions are slightly pressed to level the cave surface, and then watered so that they do not need to be covered with cold in winter. When the leaves are unearthed in March of the following spring, loosen the soil and water in time, cooperate with liquid topdressing and water once every 10-15 days, pay attention to ploughing, loosening soil, weeding and adding a small amount of artificial spray or shade in dry places, which can ease the change of withered and yellow leaves in early summer.

Culture methods and matters needing attention of scallions

1. Culture methods:

1. Light and temperature. Scallions like sunny growth environment, do not like semi-shade, the suitable temperature for growth is between 15 ℃ to 25 ℃, prefer cool. Winter generally does not need to do a lot of cold protection measures, the ground part of spring onions will die in summer, the underground bulbs can be dug out and preserved in a ventilated place.

2. Watering and fertilizing. Scallions need to do a good job of water and fertilizer management, watering should be combined with fertilization. During the growing period of scallions, you need to loosen the soil and water in time, usually fertilizing every 2 to 3 weeks. You can apply some thin liquid fertilizer and water it with fertilization. When the summer is hot and the air is dry, the air humidity can be improved by shading or spraying. When it is rainy, timely drainage is needed to avoid stagnant water but bulb rot.

2. points for attention:

The growth of scallions requires loose, fertile sandy soil and good drainage.

What if the scallions don't blossom?

1. Watering: if you want it to blossom, don't water it too much. Too much water can also cause the roots of plants to rot. The soil had better be 50% wet and 50% dry. And watering had better have a fixed amount, do not irrigate too much this time, the phenomenon of less watering appears next time. This is bad for any plant.

2. Soil: soil is the foundation of growing plants, and if you want this plant to blossom, soil is also very critical. When choosing soil, we must choose sandy loam with good drainage and rich in certain humus. Many friends think that the flowering of plants has little to do with the soil, which is a wrong idea.

3. Ventilation: ventilation is a problem that many novice flower growers will ignore. This plant needs a smooth ventilation environment, which is not only conducive to flowering, but also can effectively reduce the invasion of diseases and insect pests.

Disease and control of scallions

The common disease of scallions is rot. After the onset of the disease, remove the residual body in time, concentrate and bury it deeply or burn it, and you can use a 75% Daconine wettable powder mixed with 50-100 parts of fine dry soil as medicine on the soil surface, of course, you can directly replace the basin soil if necessary. At the initial stage of the disease, some liquids can be sprayed, such as 40% chlorothalonil suspension 500x, 50% methyl thiophanate wettable powder 800x, or 50% carbendazim wettable powder 1000 times. The site of the disease can be smeared with medical Dakening ointment, which can be treated effectively.

Green onion culture must pay attention to the proportion of soil, and then do a good job in temperature and light control, so that timely fertilizer and water or disease control is needed. Only when all this work is done, can we ensure that the green onion will grow better.