For summer varieties of spinach sow in late spring, and protect with fleece if there is danger of frost. For winter varieties sow at the end of the summer. Sow in situ in drills 30cm apart, and thin to 15cm between plants. Alternatively sow in modules and transplant to final spacing.
Spinach (spinacia oleracea) was likely to be first cultivated in central and southwestern Asia; spinacia tetranda, the wild form of spinach, is still gathered as a wild edible green in Anatolia.