A cross between the Kentucky Wonder and Blue Lake beans, the Kentucky Blue bean grows well in just about any garden. With the short growing season required for maturity, and the generous crop yield, it is no wonder so many gardeners are learning how to grow Kentucky Blue beans. Start planting these beans after all threat of frost has gone and daytime temperatures remain above 60 degrees. Harvest the plump beans just 60 days later.
Choose a location which receives at least six hours of direct sunlight each day. After the daily temperature reaches 60 degrees, prepare the planting area. Till or spade the garden site and remove debris and rocks. Break up large clumps of soil. Work in the compost, if desired, during the tilling.
Create soil mounds about 6 inches in diameter and 2 inches high. Drive a pole or garden stake in the center of the mound.
Plant four to six beans, on their side, per mound. Cover with 1/2 inch of soil. Water lightly after planting and keep the soil slightly moist until the seeds sprout. Beans need plenty of water during the growing season. During the sprouting process, the bean seed will rot if kept too wet. After sprouting, water daily when there is no rain.
Use shallow cultivation methods during the growing season to keep from damaging the shallow root system of the Kentucky Blue beans. Damaged roots means lower yield and could possibly delay the harvest.
Harvest the beans as soon as they are 5 to 6 inches long. Delaying harvest causes the Kentucky Blue bean to stop fruit production.