They will thrive in a sunny spot and sandy soil. Common yarrow (Achillea spp.) is an easy flowering annual to grow from seed. Scatter the seeds over the mix and just cover them lightly.

Woolly yarrow plants may be available in your local nursery, but if you can't find mature plants, it also grows well from seed. Choose an option such as Outsidepride Perennial Achillea Tomentosa ...