Spinach seedlings3/19/2023 ![]() ![]() ‘Bordeaux’ green leaves with red veins, bolts easily in hot weather.Spinach grows best if seeds are started in cool weather. 5-4 weeks before the first frost in fall: direct sow in the garden to overwinter for early spring harvest this crop should be covered with shredded leaves for straw and a floating row cover before freezing weather arrives remove the cover and mulch in early spring to allow plants to continue growing.6-4 weeks before the first frost in fall: direct sow in a plastic tunnel or cold frame for fall and winter harvest.8-6 weeks before the first frost in fall: direct-sow in the garden.Every 3 weeks until temperatures rise into the mid to high 70°sF plant succession crops.6-4 weeks before the last frost: direct-sow in the garden minimum soil temperature is 35°.12-10 weeks before the last frost in spring: direct sow in a plastic tunnel or cold frame for spring crop.Interplanting: Interplant spinach with carrots, radishes, strawberries.Ĭontainer Growing Spinach: Choose a container 4-6 inches (10-15 cm) deep. Cut plants back to about 3 inches (7 cm) above the soil in late summer the plant will produce new leaves for autumn harvest.Aphids and leaf miners can attack spinach.Fertilize with an organic fertilizer such as fish emulsion at half strength. ![]() Make successive sowings every few weeks for an extended harvest.Plant spinach where beans have just grown if you can. Avoid planting spinach where beets, chard, or orach has recently grown.Spinach planted in the fall can winter over under straw and a floating row cover and will begin new growth early in spring.Spinach can tolerate light frosts in the spring and freezes in the fall.Spinach grows best when daytime temperatures are in the 60s☏ (mid- to high teens ☌).Add aged compost to planting beds in advance of sowing compost will feed the soil and aide moisture retention.Keep the soil evenly moist until seeds germinate then keep the soil moist until seedlings are well established once plants are established mulch with straw to keep the roots cool and moist.When sowing seed in summer for fall harvest, first place the seed in a folded damp paper towel placed in a plastic bag and kept in the refrigerator for 5 days before sowing.Seed germinates in 7 to 14 days at or near 70☏ (21☌)-but sometimes seed can take up to 3 weeks to germinate in cold soil.Spinach prefers a soil pH between 6.5 and 7.5.Spinach grows best in full sun but can tolerate light shade.Space plants 6 to 9 inches (15-22 cm) apart in a staggered pattern or in rows 11 to 18 inches apart.Make sure there is good air circulation around seedlings and maturing plants to avoid disease. Sow seeds 1 inch (2.5cm) apart later thin seedlings to 6 inches (15cm) apart use the thinnings in salads.Direct-sow spinach seeds in the garden 6 to 4 weeks before the last spring frost spinach can be started indoors a couple of weeks earlier.Spinach is grown from seeds or transplants.Spinach matures in 35 to 50 days depending on the variety. Bolting can be slowed by picking the oldest leaves first, but bolting ultimately can not be stopped if spinach matures in very warm weather. Hot weather will trigger bolting and seed-stalk formation. Time spinach seed starting so plants come to harvest before or after the very warm and hot weather of summer. Mature spinach plants can tolerate temperatures as low as 10 to 20☏ (-12 to -7☌). Spinach grows best in the cool weather of spring and fall.
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