Fill two planters with potting soil, leaving about an inch of space from the top. Plant spinach seeds in one planter according to package directions, typically 1/2 inch deep and 1 inch apart. In the second planter, gently transplant the artichoke starter plant, ensuring its roots are well covered with soil.

Water both plants thoroughly after planting and continue to water regularly to keep the soil consistently moist but not waterlogged. Place the planters in a location that receives at least 6-8 hours of direct sunlight per day, such as a sunny windowsill or outdoor patio.

Spinach can typically be harvested in 30-45 days by picking the outer leaves, allowing the inner leaves to continue growing. Artichokes are ready for harvest when the buds are firm and tightly closed, usually 75-100 days after planting; cut the stem about 1-2 inches below the bud.