The use of onions has a beneficial effect on the entire human body. This plant contains a large number of important and useful mineral salts, potassium, calcium, magnesium and phosphorus. The iron in this vegetable is the same as in carrots, and the sugar in some varieties can be more than in watermelon. Onions can be grown both outdoors in summer and in hotbeds in the cold season. Cultivation of onions in a greenhouse will allow obtaining enough for the health of the body of vitamins A, B, PP and C. Let's consider in more detail how to grow onions in a greenhouse.
General recommendations
Those who want to grow onions themselves should know that there is nothing difficult in this occupation. First you need to choose the right grade for planting. Such variants as "Trotsky" or "Spassky" variety give a good harvest. For best results it is better to use a greenhouse or film shelter. The yield of onions in the greenhouse is much higher and the ability to collect ready-made fruits will appear much earlier.
To grow onions in winter in the greenhouse, the land should be prepared, loosened and fertilized in advance. 30 g superphosphate and 15 grams of potassium chloride should be enough to fertilize one square meter of the earth. Plant plants better before the onset of the cold season. The optimal period for planting is the beginning of autumn. The distance between bulbs should be 1.5-2.5 cm, and between rows - 5-7 cm. Onions in a greenhouse should be sheltered in winter. As a rule, to protect landings use manure mixed with straw or sphagnum peat.
In the first spring months, warming from the beds should be removed, after which it is necessary to tighten the planting with a film. In the following period it is very important not to forget about regular watering and fertilizing of plants. During the spring, you must twice make onion with nitrogen fertilizer at a rate of 15 g per 1 square. m.
The first green stems will appear already at the beginning of May. When the onion reaches a height of 20 cm, it can be collected from beds together with bulbs. The average number of crops from 1 square. m. can be from 10 to 15 kg.
Tips for growing in a heated greenhouse
In a slightly different way, the plant is grown in a heated greenhouse for onions. Boxes into which the onion will be planted must be filled with soil or peat. In order to get more harvest, you can warm up the bulb for a day before planting the bulb. Then the tip must be cut off. After carrying out all the procedures, the ready harvest can be collected in a month. However, in order to achieve better results, a certain temperature regime should be strictly observed. It is 18 ° C during the day and 12-15 ° C at night.