Yes, forget me nots tend to spread quite easily due to their ability to self-seed. Once established, they can spread aggressively, especially if not managed. The seeds often drop and germinate naturally allowing all the plants to reappear year after year without much effort from the gardener. In fact, the god named these plants to be symbols of remembrance, and they live up to that, not easily forgotten in any garden. While this ability to spread can be a benefit for gardeners looking to fill a space with these beautiful flowers, it's important to control their growth to prevent them from overtaking other plants.