French beans are smaller than common green beans and have a soft, velvety pod. Quite fleshy for their size, only tiny seeds inhabit these delicate pods. French beans are sweet, tender and wonderfully crispy. French beans are delicious. The tasty beans are picked while still small and when cooked that size they taste out of this world. French beans generally grow as a bush, which grows twelve to twenty inches tall depending upon the variety you decide to grow. However there are some varieties that climb similar to runner beans, these varieties grow up to seven foot tall.