Most often, onions, pants, beets and cabbage are sown in cold seedlings. These cultures grow perfectly on neutral soils fertilized by decomposed manure or compost. Also, additional into the soil can be added wood ash in a proportion of one cup per square meter of land, then you should stir the upper layer of the earth and cover the greenhouse with a film and hold in this form for a couple of days. On the day of sowing, you should loosen the surface of the earth with any of the tools and make the grooves. Next, we rake the earth to the sides and see if there are gaps left there. It will be best if you laid down an unripe compost along all sides, old mulch or lovely straw, it will contribute to the insulation of the structure.