The seeds of a kidney bean take 10 to 14 days to germinate, and the kidney beans themselves reach maturity in 90 to 150 days. They grow best in loose, well-draining soil with soil temperatures of 70 to 80 degrees Fahrenheit.
To ensure proper and timely growth, kidney beans should be watered evenly but not too often. Allowing the top layer of soil to dry out before watering again is a good rule to follow.
Kidney beans are named for their kidney shape and usually have a dark, red appearance. They have high levels of protein, calcium and magnesium, making them a good alternative to meat for vegetarians.