Pinto beans mature in approximately 95 to 105 days, according to Purdue University. Early planting produces larger crops and makes problems with early frosts less likely.
It takes a pinto bean plant more time to reach maturity when exposed to poor weather conditions. Determinate and indeterminate varieties also mature at different rates, with indeterminate plants maturing about 10 days earlier than others.
Pinto beans take a considerable amount of time to grow as compared to many other garden plants. They do best in areas with a long growing season followed by a dry fall to allow the beans to fully mature.