How to Grow Blue Ball
iNaturalist
Blue Ball
Gomphrena globosa
flowerBlue Ball is a decorative flowering plant prized for its striking globe-shaped flower heads in shades of blue, purple, and violet. These compact annuals produce long-lasting blooms that are excellent for fresh and dried arrangements. The plant thrives in warm conditions and is relatively low-maintenance, making it ideal for borders, containers, and cottage gardens.
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Example Blue Ball timeline · Pittsburgh, PA (Zone 6b)
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Plant Blue Ball
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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First Blue Ball blooms
Around Jun 16≈ 60 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Blue Ball dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 3-11 as an annual; return as perennial in zones 9-11
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Seedling
2-3 weeksTiny seedlings with true leaves emerging; plants are delicate and small
Keep soil moist but not waterlogged. Provide bright, indirect light. Thin seedlings to proper spacing. Maintain warm temperatures (70-75°F).
Vegetative Growth
3-4 weeksPlants develop bushy foliage with multiple stems and growing taller; no blooms yet
Pinch back growing tips to encourage bushiness. Maintain consistent watering. Apply balanced fertilizer every 2-3 weeks. Gradually acclimate to full sun.
Flowering
4-6 weeks until peak floweringFirst globe-shaped flower heads appear in blue, purple, or violet colors; blooms continue to develop
Switch to phosphorus-rich fertilizer to promote blooming. Deadhead spent flowers to encourage more blooms. Maintain steady watering schedule.
Peak Bloom & Continuation
8-12 weeks until frostPlant covered in multiple globe-shaped flower heads at various stages of maturity; continuous blooming
Continue deadheading or allow flowers to mature for seed collection and drying. Water consistently. Apply balanced fertilizer every 3-4 weeks. Harvest for dried arrangements.
Decline & End of Season
Until first frostFlowering slows as temperatures cool in fall; foliage may fade; seed heads form if not deadheaded
Allow remaining flowers to dry on plant for ornamental value or seed saving. Stop fertilizing. Reduce watering slightly. Plant will die back at first frost in cold zones.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Spray with water to dislodge; use neem oil or insecticidal soap if infestation is severe. Increase humidity around plants.
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Use yellow sticky traps to monitor and capture. Apply neem oil or insecticidal soap. Remove heavily infested leaves.
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Hand-pick in early morning or evening. Use diatomaceous earth barriers. Apply beer traps or organic slug bait around plants.
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Ensure well-draining soil and avoid overwatering. Improve air circulation. Remove affected plants immediately.
Uses
Dried Arrangements
CraftBlue Ball flowers dry exceptionally well and maintain their vibrant color for months, making them ideal for dried floral arrangements, wreaths, and decorative crafts. [source]
Edible Flowers
CulinaryThe flower heads are edible and can be used as a colorful garnish for salads, desserts, and beverages, adding visual appeal and a mild, slightly sweet flavor. [source]
Cut Flower Arrangements
HouseholdFresh-cut Blue Ball flowers last 10-14 days in water and are excellent for adding texture and color to fresh floral bouquets and arrangements. [source]
Pollinator Attraction
WildlifeThe globe-shaped flowers attract butterflies, bees, and other beneficial insects, making Blue Ball an excellent choice for pollinator gardens. [source]
Traditional Herbal Use
MedicinalIn traditional medicine systems, particularly Ayurveda and Traditional Chinese Medicine, globe amaranth is used in herbal preparations for various health purposes. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
For fresh arrangements, cut stems in the morning when flowers are fully open. For dried flowers, harvest when globe heads are fully formed and color has deepened (usually 2-3 weeks after first opening). Hang bundles upside-down in a warm, dry, dark location for 2-3 weeks. Dried blooms will retain color and shape for months.
Fun Facts
- 🌱 Blue Ball (Gomphrena globosa) is also known as globe amaranth, despite being unrelated to true amaranths; it's called 'globe amaranth' because of its globe-shaped flower heads and straw-like texture similar to amaranth species.
- 🌱 The flowers are nearly everlasting because their petals are actually papery bracts (modified leaves) rather than true petals, which is why they retain color and structure exceptionally well when dried.
- 🌱 In some tropical regions, Blue Ball is grown as a perennial and can re-bloom year after year, though in temperate climates it's treated as an annual or tender perennial.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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