In order to get a gorgeous harvest of large turnip onions, it is necessary to plant it with onion sets measuring an average of 1.5-3 cm.
Before starting planting, the onion sets must be carefully sorted out and all poor-quality bulbs must be sifted out, and what remains to be sorted according to parameters so that the seedlings are as uniform as possible. Initially, large bulbs are planted, then medium-sized bulbs and only then the smallest ones.
If you have onion sets from the last harvest, which was stored at an average temperature of 18-20 degrees, then you should not warm it up, and if you already have a purchased onion for planting, then it is better to preheat it 2-3 days before sowing at a temperature of 30 degrees -35 using heating devices. After warming up, the onions for sowing, wrapped in a cloth bag, should be dipped in a solution (10 liters of water for 1 tablespoon of any complex fertilizer) for 10-14 hours. Then place the seed in a solution of copper sulfate for 10 minutes (1 hour spoon for 10 liters of water).
But there is another way to process onions before sowing: pour the seed into a bucket and pour it literally for a couple of minutes with water at a temperature of 70 degrees, and then lower it for about 1-2 minutes in cold water. This procedure is carried out just before sowing.
Planting of turnip onions is carried out in a pre-prepared bed, which is cleared of all kinds of weeds and properly fertilized with organic and mineral substances. Small grooves are made on the ridge with a depth of 4 cm and a distance of 15 cm between each other.
Planting is usually done in late September - early October. Before frosts, the sevok should be insulated from freezing, and accordingly death, for this purpose, the ridge is insulated with sawdust with a layer of cm 5. In the spring, the sawdust is removed. In winter, you need to make sure that the ridges with onions are not abundantly filled with water, since the sevok can rot. Also, turnip onions can be planted in spring, but only "winter onions" are distinguished by the greatest resistance and productivity.