Planting Gomphrena (Globe Amaranth)
Gomphrena (Globe Amaranth) is a warm season flower in the Amaranthaceae family. Getting the timing right is the difference between a strong stand and a disappointing one, so the windows below are given relative to your own last spring frost and first fall frost rather than a generic calendar date. Look up your local frost dates and count back or forward from there.
Gomphrena (Globe Amaranth) is started indoors 6–8 weeks before your last spring frost date, giving seedlings a head start before they move outside.
Sow Gomphrena (Globe Amaranth) directly into the garden 0–1 weeks after your last frost, once the soil has warmed.
Gomphrena (Globe Amaranth) can be grown by starting indoors and direct sowing. Starting indoors gives the longest, most controlled season, while direct sowing is simplest where the season is long enough.
Spacing and Planting Depth
Give Gomphrena (Globe Amaranth) room to mature. The figures below come from verified extension and seed-supplier data for typical varieties.
| Spacing in row | 10 inches |
|---|---|
| Row spacing | 12 inches |
| Plants per sq ft | 1.2 |
| Planting depth | 0.125 inches |
| Sun requirement | Full sun |
Days to Maturity
Gomphrena (Globe Amaranth) reaches maturity in 85–100 days from transplant.
Gomphrena (Globe Amaranth) is ready to harvest after about 93 days. Harvest before the first fall frost, which will end the plant's productive season.
Conditions and Care
As a warm-season flower, Gomphrena (Globe Amaranth) needs warm soil and settled weather to thrive, and is set back or killed by frost. It is frost tender, so wait until all danger of frost has passed before planting out and harvest before the first fall frost.
Gomphrena (Globe Amaranth) needs full sun — give it at least six hours of direct light a day for the best growth and flavor. Sow seed about 0.125 inches deep — small seed is sown shallow and barely covered, then keep the soil evenly moist until seedlings establish.
Gomphrena (Globe Amaranth) belongs to the Amaranthaceae family; rotating where you grow members of this family each year helps limit the build-up of soil-borne pests and disease. Gomphrena (Globe Amaranth) is generally grown as a single planting each season rather than succession sown.
Growing Notes
Heat-loving everlasting; pollinator magnet.