I tried to grow beets in Central Europe, where it is a common plant. It's the third year that my little seedlings, which germinate very nicely, stop growing. Their leaves turn red, then turn yellow and stop growing. They don't die. I have to be doing something wrong, but I can't figure it out. I changed the variety and seeds, I changed the soil, I sowed both directly and transplanted, I tried multi-sowing and nothing helps. I would be very grateful for any advice.