The pinto bean originated in Peru and was brought to the United States by Mexican cowboys, earning them the nickname, "the cowboy bean." The United States is now one of the largest producers of pinto beans. There are many varieties of pinto beans that can be grown in USDA planting zones 4 through 11. Choose a location that is in full sun. Pintos should not be planted on low or sloping ground. Plan planting for spring when the soil has reached 60 degrees F.
Prepare the soil as soon as it can be worked in the spring. Remove the top layer of lawn turf and weeds. Till to a depth of 6 inches and water to allow the weed seed to sprout. Pull all sprouted weeds and cover the soil with 2 inches of compost. Till the compost into the soil and rake out smooth. Water every other day for 2 weeks and pull weeds out again.
Drag a hoe to create rows for planting once the soil temperature reaches 60 degrees. Plant the seeds 1 inch deep, 3 inches apart with rows 20 inches apart.
Water the soil well immediately after planting and three times a week thereafter. Watering is especially important when the plants start to bud. At that point keep the soil evenly moist. Always water in the morning to allow the plants time to dry out during the day. Hold back water when the seed pods begin to mature.