Beautiful in sunny meadows or in the home landscape, verbena is a no-fuss plant that will make hummingbirds and butterflies happy from spring until fall. Although verbena is a perennial in very warm climates, it is nearly always considered an annual, dying when the weather turns cold in autumn. Luckily, saving seeds from healthy verbena plants is a snap, and you can save them for planting the following spring.
Select a healthy verbena plant and reserve that plant for seed-saving. Don't pick or deadhead the blooms on the reserved plant, but instead, allow the blooms to wilt naturally.
Wait until the bloom is completely wilted. You'll be able to see the seed cluster at the base of the blooms. When the seed cluster turns brown, pick the clusters off the stems and toss them in a paper sack.
Leave the top of the paper sack open so air can circulate, and put the sack in a cool, well-ventilated place for at least a week. The verbena seeds will be light tan in color, and will be very small. They will be mixed in the chaff from the seed cluster, but it isn't necessary to separate the seeds from the chaff.
Put the seeds in an envelope and put them in a safe place until spring. If you like, you can leave them in the paper sack.