Dainty little verbena flowers may look delicate, but they're tough little annuals that love sunshine and won't mind a few dry days. They're versatile plants that do well as a ground cover, edging a flower bed or a sidewalk, or in a container or hanging garden, spreading out and blooming from late spring to the first freeze. Although verbena are readily available as bedding plants, consider starting new plants with seeds you've collected.
Leave a few healthy verbena blooms to die naturally on the plant. As the flowers fade, they will be replaced by light brown clusters that develop on top of the stem.
Pinch the clusters off the plant and let them drop on a paper plate. Put the paper place in a dry, cool spot and let it dry for a week to 10 days.
Rub the dry cluster between your fingers, and the tiny, off-white or tan seeds will separate from the dried plant matter, or chaff.
Label a paper envelope or a small paper bag. Drop the seeds in the bag, along with the chaff. Put the seeds in a cool, dry place until spring.