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Gomphrena globosa, commonly called globe amaranth, is one of those cheerful summer flowers that rewards gardeners with very little fuss. Its round, papery blooms appear in shades of purple, pink, white, and sometimes red, and the flowers are excellent for both fresh and dried arrangements. The plants enjoy heat, full sun, and well-drained soil, making them particularly useful in sunny borders and containers.
Planting
Globe amaranth thrives in full sun, ideally receiving at least six hours of direct sunlight each day. Choose a location with well-drained soil; soggy conditions can lead to root problems.
For an early start, sow seeds indoors about 6–8 weeks before the last expected frost. Once seedlings have developed several true leaves and outdoor temperatures have warmed, gradually acclimate them before transplanting.
Seeds can also be sown directly outdoors after the danger of frost has passed. Space established plants about 12–18 inches apart to provide room for growth and good air circulation.
Maintaining the Plants
Once established, globe amaranth is remarkably easy to maintain. Pinching off the first flower buds can encourage a bushier plant with more branching. Throughout the summer, regularly cutting flowers for bouquets or removing faded blooms can encourage additional flowering.
Keep the area around the plants relatively free of weeds. A thin layer of mulch can help conserve soil moisture and keep soil from splashing onto the foliage.
Watering
Newly planted globe amaranth needs consistent moisture while its roots become established. Water deeply when the soil begins to dry, rather than giving the plants frequent, shallow sprinkles.
Mature plants tolerate dry conditions reasonably well, but flowering is generally better when they receive adequate moisture. At the same time, avoid overwatering. Allow excess water to drain away, and water at the soil surface, when possible, rather than repeatedly wetting the foliage.
Fertilizing
Globe amaranth is a relatively light feeder and usually does not require heavy fertilization. If the soil has been enriched with compost, additional fertilizer may be unnecessary.
In poorer soil, apply light, balanced fertilizer during active growth. Avoid excessive nitrogen, which can encourage leafy growth at the expense of flowers. If a soil test indicates a need for phosphorus or potassium, address those nutrients according to the test results.
Pest Control
One of the advantages of globe amaranth is that it generally has few serious pest problems. Nevertheless, inspect plants regularly, especially during hot, dry weather.
Possible visitors include:
- Aphids: Wash small infestations from stems and leaves with a strong stream of water.
- Spider mites: Look for fine stippling or webbing, particularly during hot, dry periods.
- Whiteflies and Mealybugs: Remove affected foliage when practical and use an appropriate insecticidal soap if necessary.
- Slugs and snails: Young seedlings may be vulnerable, so protect tender plants and remove hiding places around the planting bed.
Good spacing, adequate air circulation, and avoiding excessive moisture can also reduce fungal problems such as powdery mildew and leaf spots.
Propagation
Seed propagation is the simplest and most reliable method. Allow some flowers to remain on the plant until they mature and become dry. Collect the dried flower heads and separate the seeds for storage.
Store seeds in a cool, dry place and sow them the following growing season. Globe amaranth can also reseed naturally in favorable conditions, although seedlings may not always have the same characteristics as the parent plants.
Using Dried Flowers in Wreaths
One of the best things about globe amaranth is how well its papery blooms hold their color and shape after drying. This makes them especially useful for creating decorative wreaths that can brighten a door, wall, or indoor space long after the garden season has ended.
To harvest flowers for wreath-making, cut the stems when the blooms are fully colored but still firm and before they begin to fade. Remove the lower leaves and gather the stems into small bundles. Hang the bundles upside down in a cool, dry, well-ventilated place away from direct sunlight. Allow the flowers to dry completely, which usually takes about one to two weeks.
Once dry, globe amaranths can be incorporated into wreaths made from grapevine, straw, wire, or other natural materials. Arrange clusters of flowers in groups for a bold splash of color or scatter individual stems throughout the wreath for a more delicate look. The flowers pair beautifully with dried grasses, wheat, eucalyptus, statice, lavender, and other preserved flowers.
Use floral wire or a small amount of craft adhesive to secure the stems to the wreath base. For a simple seasonal decoration, combine purple globe amaranth with dried grasses and natural foliage. For a brighter arrangement, mix pink, white, and purple blooms together.
Keep finished wreaths away from moisture and prolonged direct sunlight to help preserve the flowers’ color. With proper care, a dried globe amaranth wreath can provide a charming reminder of the summer garden for months or even years.
A Summer Favorite
Globe amaranth is a wonderful choice for gardeners who want long-lasting color without demanding maintenance. Give it sunshine, good drainage, moderate water, and occasional grooming, and it can provide colorful blooms throughout the warm season. The papery flowers also retain their color well when dried, allowing the garden to continue decorating the home long after the growing season ends.
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