A biennial, it probably sprouted from seed deposited by a passing bird.

But alms given to those who are yet under the tyrannical yoke of the passions are like seed deposited in a bad soil.

Toxins might have evolved to prevent consumption by animals that disperse seeds into unsuitable habitats, to prevent too many fruits from being eaten per feeding bout by preventing too many seeds being deposited in one site, or to prevent digestion of the seeds in the gut of the animal.

Cutting giant hogweed before the plants flower will help to prevent further seeds being deposited on the ground.

Evidently soil formed from decomposed lava had rested there, and in due course had become the receptacle of seeds deposited by birds.

Finally, seeds may be secondarily dispersed from seeds deposited by primary animal dispersers.