Plant peanuts in a sunny spot in the garden once the last frosts have passed. Till the soil to a depth of at least 8 inches to remove any lumps, and then enrich the soil with 1/2 cup of balanced 8-8-8 fertilizer for every 10 feet of row. Sow seeds 2 to 3 inches deep in sandy soil and 1 1/2 inches deep in heavier soil. Sow five seeds per foot of row with 20 inches between rows.
Water immediately after sowing, and aim to keep the soil continually moist. Increase watering as the flowers fade and the developing pods start to grow down into the ground. Avoid wetting the foliage when watering your peanut bushes, and do not water your peanut plants for about 10 days prior to harvesting, as wet peanuts may sprout in the ground.
Remove the weakest seedlings, leaving two or three plants per foot. Apply a 2-inch layer of organic mulch, such as compost or bark chips. This maintains soil moisture and suppresses weeds. Hand-pull any weeds that emerge.
Harvest your peanuts by digging up the bush and collecting the pods. Peanuts for boiling can be harvested between 90 to 110 days after planting, while peanuts for roasting take between 130 and 150 days to mature.