Globe amaranth’s nearly nonstop flowers make it an all-time favorite for beds, borders, and containers, where it will attract butterflies and take the summer heat without missing a beat. Its bright pom-poms last a long while in fresh and dried arrangements. Once you plant this versatile annual, you can step back and watch it add continual beauty to your landscape right up until frost.
You'll have to look closely to see globe amaranth's tiny white or yellow flowers. What really stands out are the plant's magenta bracts (modified, colorful leaves that look a little like petals) displayed in clover-like flowerheads that seem to never quit, even in the hottest weather. This annual's ability to withstand extremely hot and humid weather makes it invaluable in low-maintenance gardens as well as mixed containers.
Globe Amaranth Care Must-Knows
This annual is easily grown in full sun and average, well-drained soil that includes a decent amount of organic matter. Transplant purchased plants or sow seeds directly in the garden after the last frost date for your region. (The germination rate is low, so use lots of seed.) If you prefer, start seeds indoors about 1½ to 2 months before the last frost date. Harden off seedlings and transplant after last frost.
Whichever method you choose, pinch back young plants to create a bushier habit. Once established, globe amaranth tolerates drought but will perform best if given supplemental water throughout the growing season. Tall plants may need to be staked to keep them from flopping.
New Types of Globe Amaranth
One of the notable discoveries in recent years in the world of globe amaranth is Gomphrena 'Fireworks', which offers a much larger habit, extremely profuse blooming potential, and flatter clustered blossoms. The newer cultivar 'Pink Zazzle' delivers huge blooms on extremely drought-tolerant, free-flowering plants.