Beet roots naturally push out of the ground as they mature. You could have 6 inches of beet above ground! However, the roots should not be so small. There are a variety of reasons for this problem, mainly related to soil preparation: 1) your soil was too compacted and not loose enough 2) there was not enough organic matter and nutrients in soil, 3) the soil was too acidic (get a soil test). Also, beets need plenty of direct sunlight and they need to thinned so they are not crowded and have enough space to grow.
Beet roots naturally push out of the ground as they mature. You could have 6 inches of beet above ground! However, the roots should not be so small. There are a variety of reasons for this problem, mainly related to soil preparation: 1) your soil was too compacted and not loose enough 2) there was not enough organic matter and nutrients in soil, 3) the soil was too acidic (get a soil test). Also, beets need plenty of direct sunlight and they need to thinned so they are not crowded and have enough space to grow.