Sphaerocephalon Allium
Allium 'Sphaerocephalon'
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Sphaerocephalon Allium - 25 Pack Bulbs is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
Delivery and Shipping
Fast, Safe Plant Delivery
Ships in 3-4 business days • Tracking provided • Weather protected
| Under $50 | $9.99 |
| $50 - $99.99 | $14.99 |
| $100 - $149.99 | $16.99 |
| $150+ | $24.99 |
✓ Zone-specific timing • ✓ Professional packaging • ✓ Health guarantee
Understanding Plant Options
Nature Hills offers plants in two main formats:
- Container Plants: Grown in pots with soil, sized by container volume and plant age
- Bare Root Plants: Dormant plants without soil, sized by height measurements
Container Plant Sizes
Container sizes indicate plant age and growing capacity rather than liquid volume equivalents. Our containers follow industry-standard nursery "trade gallon" specifications, which differ from standard liquid gallon measurements.
Young Plants (6 months to 18 months old)
| Container Size | Actual Volume | Metric Equivalent |
|---|---|---|
| 2" x 2" x 3" | 0.18 - 0.21 dry quarts | 0.20 - 0.23 dry liters |
| 4" Container | 0.31 - 0.87 dry quarts | 0.35 - 0.96 dry liters |
| 4.5" Container | 0.65 dry quarts | 0.72 dry liters |
| 6" Container | 1.4 dry quarts | 1.59 dry liters |
| 1 Quart | 1 dry quart | 1.1 dry liters |
| 5.5" Container | 1.89 dry quarts | 2.08 dry liters |
Established Plants (18 months to 2.5 years old)
| Container Size | Actual Volume | Metric Equivalent |
|---|---|---|
| 2 Quart | 2 dry quarts | 2.2 dry liters |
| #1 Container | 2.26 - 3.73 dry quarts | 2.49 - 4.11 dry liters |
| 5" x 5" x 12" | 3.5 - 4.3 dry quarts | 3.85 - 4.74 dry liters |
Mature Plants (2-4 years old)
| Container Size | Actual Volume | Metric Equivalent |
|---|---|---|
| #2 Container | 1.19 - 1.76 dry gallons | 5.24 - 7.75 dry liters |
| #3 Container | 2.15 - 2.76 dry gallons | 8.14 - 12.16 dry liters |
Large Plants (3-5 years old)
| Container Size | Actual Volume | Metric Equivalent |
|---|---|---|
| #5 Container | 2.92 - 4.62 dry gallons | 12.86 - 20.35 dry liters |
| #6 Container | 5.25 - 6.01 dry gallons | 23.12 - 26.42 dry liters |
| #7 Container | 5.98 - 6.53 dry gallons | 26.34 - 28.76 dry liters |
Bare Root Plants
Bare root plants are sold by height from the root system to the top of the plant. Plants may exceed minimum height requirements.
Common Sizes:
- Trees: 1 foot, 2 feet, 3 feet, 4 feet, 5 feet, 6 feet
- Shrubs & Perennials: 1 foot, 18 inches, 2 feet
Important Notes
Container Volume Specifications
- Trade Gallon Standard: Our containers follow industry-standard "trade gallon" specifications established by the American National Standards Institute (ANSI Z60.1) for nursery stock
- Volume Variations: Actual soil volume may vary due to plant root systems and growing medium settlement
- Age Indicators: Container size primarily indicates plant age and maturity rather than liquid volume equivalents
Growing Conditions
- Plant size can vary based on variety and growing conditions
- Container size helps indicate plant maturity and establishment level
- Larger containers generally mean more established root systems and faster landscape establishment
Seasonal Availability
- Bare root plants are available seasonally when dormant
- Container plants are available throughout the growing season
- Specific varieties may have limited availability in certain sizes
Questions?
For questions about specific plant sizes or availability, please contact our plant experts who can help you choose the right size for your landscape needs.
Plant Highlights
Sphaerocephalon Allium highlights at a glance!
Specifications
Specifications
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Brand
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Botanical Name
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Growing Zones
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Mature Height
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Spacing
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Sun ExposureFull Sun
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Moisture
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Soil
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Growth RateFast
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Pollinator Friendly
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Pollinator Required
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Pruning Time
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Bloom PeriodLate Spring
Growing Zones 4-8
As gardeners, we gravitate to the strange and usual offerings that will set our gardens apart! So Nature Hills is sure you'll love the unique Sphaerocephalon Allium (Allium 'Sphaerocephalon') the purplish-maroonish-violet oval blooms that are tightly packed drumsticks atop slender green stem that wave in the breeze!
The upright grassy foliage is hollow like its onion family relations, but won’t make your eyes water! You may notice a slight onion scent when the foliage is cut, but that won't stop the bees, and butterflies, and occasional hummingbirds from seeking out these nectar-rich blooms!
Also known as Drumstick Allium or Round-Headed Alliums, these unique selections are lovely textural and colorful accents throughout USDA growing zones 4-8 and form naturalizing clumps 14-16 inches tall.
Planting and Application:
Sphaerocephalon Allium is a highly Ornamental Onion that are must haves for a quirky pollinator or Cut Flower garden! You'll enjoy unique bouquets and loads of pollinators anywhere you do choose to plant these whimsical late-spring to early summer flowering bulbs! These are a must have for the Children's Garden, in a modern Cottage and Perennial border, and melds well into both informal and formal settings.
Alliums are space-saving little bundles of drama and look fantastic in planters as thrillers and vertical height! Both as an addition to a mixed container garden, or as the feature planting in groupings with a spiller planted around the edges. The grassy foliage looks great as edging and seasonal facer plants along your garden bed and border edges!
- Unique Tightly Packed Oval Flower Clusters
- Maroonish-Purple Flower Heads
- Upright Green Foliage & Slender Stems
- Bee, Butterfly & Hummingbird Friendly
- Unique Cut Flowers & Garden Texture
- Great in Containers, Back Border, Vertical Interest & Specimens
#ProPlantTips for Care:
You'll have the most blooms in full sun when grown in cooler climates and appreciating partial shade (afternoon shade) in hot climates, any rich, well-drained soil is perfect for Allium. Fall-planted bulbs need moderate moisture needs. Any soil type is suitable so long as it is not soggy and add bulb fertilizer to each hole for best results. Despite being a member of the Onion family, there is no Onion smell unless the foliage is broken or crushed. Deadhead to remove spent blooms or try this trick - spray paint the dried seed heads any color you choose for unique garden décor for the rest of the summer and fall! Deer, rodents, squirrels, pests, and diseases usually don't bother these easy-going flowering perennial bulbs!
- Full Sun For Strongest Growth
- Well-Drained Soil Of Any Kind
- Moderate Moisture Needs
- Deadhead After Flowers Fade & Prune Mounds After Leaves Yellow
- Squirrels, Rodents & Deer Seldom Bother These Plants
Add some whimsy and fantasy to your garden with the unique blooms and deep color that also adds motion and texture to your landscape! Order quality bulbs at Nature Hills and have them shipped to your doorstep at the proper planting time for your growing zone!
