 Spadefoot toads grow up in 14 days, but the bullfrog can take two years to fully develop. Learn more about raising tadpoles at livingthecountrylife.com. I'll see you in the country. Living the Country Life. Ideas and inspiration for your place in the country. You can find more information on today's topic, share your tips, and post photos by visiting us online at livingthecountrylife.com.