Pencil Pod Black Wax Yellow Bush Bean Seeds Heirloom Vegetable. This vigorous, stocky bush bean is a prolific producer. Fleshy, light yellow pods 12-15 cm (5 to 6″) long are quite tender and generally stringless. Plants grow to between 40-50 cm (16-20″) tall. A highly dependable multi-use bean for both home and market gardeners alike.