Beets can be sown successionally outdoors from early spring to midsummer. Cold conditions can cause early sowings to bolt. Prevent this by sowing seed in cells indoors, using bolt-resistant varieties, or covering young plants with fleece or cloches. Draw out a row 1 in (2 cm) deep and sow seeds at 1 in (2 cm) intervals along it. Cover with soil, label, and water well. Space rows 8 in (20 cm) apart. Sow at the same depth in large, deep containers, spacing seeds 2 in (5 cm) apart. Alternatively, sow single seeds in cells and germinate on a cool windowsill or in a greenhouse.
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