Red beans and red kidney beans are not the same.

Red beans and red beans are different in shape, red beans are generally oval, and red beans are larger than red beans in a flat shape, after cooking there will be a sticky situation, red beans compared to red beans harder. However, both red beans and red beans belong to the annual erect or twining herbs, up to 90 centimeters high, pinnately compound leaves.

The stipules are peltate, sagittate, and the leaflets are ovate to rhombic-ovate, entire or shallowly trilobed, and slightly sparsely hirsute on both surfaces. Flowers yellow, pedicels very short. Bracteoles lanceolate, calyx campanulate, flag petals compressed-orbicular or subreniform, wing petals wider than keel petals, ovary linear, style curved, pod terete, seeds usually dark red or other colors, oblong, hilum not depressed.

Growth habit of red beans

Red beans are warm, light-loving and resistant to waterlogging. The full-life span needs more than 10 ℃, effective cumulative temperature of 20 to 25 ℃, usually in 8 to 12 ℃ above the beginning of germination and seedling. Red bean is sensitive to light response, premature sowing to extend the growth period, maturity is not earlier. Therefore, the introduction of seeds from high latitude to low latitude will mature earlier, while the introduction of seeds from low latitude to high latitude will extend the maturity period.

Red beans vary in length depending on the variety. The short growing period can be 60 to 90 days, and the long growing period can be 80 to 120 days. Red beans need the most water before and after flowering, flowering and pods in the period of high temperature, drought, easy to cause the fall of flowers, pods. Too wet, the plant is prone to collapse. In the drum grain maturity period, the weather is sunny and favorable for photosynthesis, which is conducive to increasing grain weight.

Red beans grow best in loose humus-rich soil. Sandy soil planting red beans grain red and shiny. Loamy soil land planted red beans hair black, dark red. Adzuki beans are more adaptable to the soil, and can grow in slightly acidic and slightly alkaline soil.