Growing Gomphrena (Globe Amaranth): A Complete Profile
By Growing Home Greens Team · July 18, 2026
Gomphrena (globe amaranth) grows a long taproot that gives it above-average drought tolerance once established, and it rewards that patience with one of the longest bloom windows of any flower on this list: April through October in a lot of climates. What look like its “flowers” are papery bracts, not petals, which is why cut stems hung upside down hold their color and shape for months in a dried arrangement instead of shattering the way true petals do.
Starting it, and waiting on the taproot
Start indoors about 7 weeks before your last frost, with transplants going out a week after; seed goes about 1/4 inch deep. At a full plant per square foot, expect steady, unhurried growth early on while that taproot establishes. Gomphrena isn’t a fast starter, but it settles in for the long haul once it’s rooted in.
Slow growth early is the root, not a problem
Slow early growth is normal and not a sign of trouble; the plant is investing in root development before it puts on top growth. Poor drought tolerance in year one usually just means the taproot hasn’t had time to establish yet. Consistent watering early on pays off later in the season when you can ease up.
Color from spring clear through fall
Gomphrena isn’t linked to specific companions or antagonists in our data. See the full companion guide for gomphrena for how it’s tracked. At 1 per square foot with a long season of bloom, it’s a reliable standard-density filler in the Garden Designer for beds that need color from spring clear through fall, well-suited to a hot, dry spot like a south-facing wall strip where less drought-tolerant flowers would struggle.
Companion planting guide for Gomphrena (Globe Amaranth) · Find your planting dates
Typically viable in USDA zones 2-11. Not sure your zone? Look it up by ZIP code.
Method: Start indoors: Start indoors from seed, then transplant outside. Gomphrena (Globe Amaranth) needs a head start most zones can't give it by direct-sowing alone.
See exact start-indoors, direct-sow, and harvest dates for your zone →
How many Gomphrena (Globe Amaranth) plants fit per square foot?
Spacing: 1 per square foot (square-foot-gardening spacing). Mature height: 1-2 ft.
Varieties worth considering
- Fireworks: NC State Extension's Plant Toolbox describes it as an amaranth with incredible drought and heat tolerance and a long bloom season, growing 3-4 feet tall, taller than most gomphrena, so plan for it at the back of a bed rather than the front. (source)
- Buddy series: NC State's Plant Toolbox lists this as a true dwarf at 9-12 inches in purple, rose or white, a fraction of Fireworks' height. The pick for a square-foot bed where Fireworks would tower over its neighbors. (source)
- Ping Pong series: A medium-tall type NC State lists at 16-20 inches in pink, purple or white, between Buddy's dwarf habit and Fireworks' 3-4 feet. Suited to a middle-of-bed spot neither of the other two fits well. (source)
Cited from the source shown next to each variety. We haven't grown these ourselves yet, so treat this as a research-backed starting point, not a personal endorsement.
Where to buy gomphrena seeds
As an Amazon Associate we earn from qualifying purchases. Some links on this page also go to other retailers we may earn a commission from as an affiliate, at no extra cost to you. We only recommend products with a genuine consensus of positive, independent reviews. See the sources cited on each item.
See it growing
Search YouTube for "growing gomphrena (globe amaranth)" videos → (a live search, not a hand-picked video; results vary and aren't vetted by us)
%3A%20A%20long%20taproot%20gives%20this%20one%20above-average%20drought%20tolerance%20and%20a%20bloom%20season%20that%20runs%20April%20through%20October.)
Pin this for later
Growing Gomphrena (Globe Amaranth): A long taproot gives this one above-average drought tolerance and a bloom season that runs April through October.
Save to Pinterest