Overwintering Spinach
Step 2
Sow the spinach seeds generously, about an inch apart, and then thin the seedlings to 6 inches once they develop three sets of leaves. Keep the soil consistently moist. After one or two light frosts, cover the spinach with 12 inches of straw mulch. Place a floating row cover over the bed to provide an extra layer of insulation in climates where wintertime temperatures hover at or below freezing for weeks at a time.
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