Earthworms are more than just fish bait. Have you noticed many earthworms in your property when you are raking the lawn or digging in landscape beds or your garden? If the answer is no, think about why they may not be there. Earthworms are a good measure of soil health. We all know that healthy soil is important to grow a lawn or any crop. Just like the doctor takes a blood test to determine your health, next to a soil test, the amount of earthworms present in your soil is a great indicator of the health of your soil.