how do you start spinach seeds inside
Step 1. Plant spinach in early spring, or as soon as the last frost for your area has come and gone. If you are starting your seeds indoors, start them three weeks before the last expected frost date.
Plant spinach seeds 1/2 inch (1.3 cm) deep and 3 inches (7.6 cm) apart in wide rows, and lettuce seeds 1/8th inch (0.3 cm) deep, and 6 inches (15.2 cm) apart. For a continuous harvest, sow every two weeks while cool temperatures allow. This way you will get a staggered harvest that lasts longer.