There are annual, biennial, and perennial forget-me-nots and all of them are low, spreading, moisture and shade loving plants with pretty soft blue flowers in spring. In Not Quite Happily Ever After Sara weeds out the Forget-me-nots that volunteer in her garden and in the woods because they can be very invasive. Their seeds have tiny hooks that grab onto clothing, shoes and socks, and animal fur, enabling them to spread far and wide. In the right situation they are a lovely frothy ground cover in the spring. Deer don't usually eat them.