Globe Amaranth is an annual and dies back with the frost. You can find fancy color varieties in red, orange, white, and dark purple but mine are the most common color, magenta. My family calls them “bachelor buttons” and my great grandmother grew them in her yard in Comfort, TX. Globe Amaranth is a late bloomer up here in Cambridge, but it really brightens up the fall garden. I bought a few plants 5 or 6 years ago and have saved the seeds each year ever since.
Globe amaranth grows well for me in full sun and lean soil. I like that they form nice bushy plants naturally without requiring pinching, pruning, or deadheading. They tolerate my lazy watering habits without getting wilty.
This is a good time of year to save seeds. A few flower heads will give you lots of seeds. When the flower has dried you can break it apart into individual seeds.
The seeds are white and fuzzy surrounded by the colorful
husks bracts. (I learned a new word there - bracts are a special kind of leaf, not petals or "husks") You really shouldn't bother separating the seeds from the bracts. In fact, you can store the flower heads intact and crumble them directly into the soil when it is time to plant. Either way, keep the seeds or flower heads in a dry, dark place until spring.