Clear all the weeds from the planting area. Calypso beans can't compete with other plants for soil nutrients and water.
Prepare the soil in the calypso bean bed by digging into it to a depth of 10 inches, turning the soil and crushing large clods. Add a 3-inch layer of sand and mix it into the top 6 inches of garden soil.
Plant the calypso beans 1 inch deep and 2 inches apart in 15 inch rows. Water the top 6 inches of soil after planting and keep the soil slightly moist while the beans germinate.
Thin the calypso seedlings to 4 inches apart when they reach 6 inches in height. Pull out the weakest plants and throw them on the compost pile or discard them.
Provide the calypso bean plants with 1 inch of water per week.
Fertilize the calypso beans when they have set pods. Dig a 2-inch deep trench, 1 inch to the side of the row of bean plants. Sprinkle 1 tbsp. 10-10-10 fertilizer on the bottom of the trench and cover it with soil. Water to a depth of 4 inches after fertilizing.
Harvest the black and white calypso beans when the pods are full. This generally occurs within 70 to 90 days of planting the seeds.