![]() ![]() The best alternative is to grow winter spinach in a cold frame or plastic tunnel. Spinach planted in autumn can survive the winter under thick mulch plants will resume growing in the spring.Spinach can be grown through the winter everywhere in a cold frame or plastic tunnel.In mild-winter regions, plant spinach in late summer or early autumn for harvest in autumn or winter sow spinach for autumn harvest 6 to 8 weeks before the first fall frost.Young plants may bolt if exposed to temperatures below 40☏ for one or two weeks after they come up.Long days and temperatures greater than 75☏ encourage mature spinach plants to bolt.Succession planting will ensure a continual harvest of fresh spinach leaves. Plant succession crops of spinach in spring every 10 to 14 days until daytime temperatures are consistently greater than 75☏.However, seedlings may suffer transplant shock if the roots are disturbed at transplant time. Sow spinach indoors 6 to 8 weeks before the last average frost date in spring for transplanting out as early as 4 weeks before the last frost. ![]()
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