Purple Rain Allium
Allium 'Purple Rain'
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Purple Rain Allium - 5 Pack Bulbs is backordered and will ship as soon as it is back in stock.
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Plant Sentry™

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Your order is protected by our compliance system that:
- Prevents restricted plants from shipping to your state
- Ensures plants meet your state's agricultural requirements
- Protects gardens from invasive pests and diseases
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
Purple Rain 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 PeriodSummer

Growing Zones 3-8
The Purple Rain Allium (Allium 'Purple Rain') is a brilliant and bright purple selection of Ornamental Onion! Unlike the stinky edible kinds, Flowering Onions won't make your eyes water! Their brilliant blooms look like fireworks atop their tall slender stems.
Not only are Allium fantastic nectar-rich blooms for bees, butterflies, and hummingbirds, but Purple Rain lends unique spiky texture and vibrant color to your spring garden beds, containers, and floral bouquets! Carrying an easy-going informal and structural formal look as well as adding drama and whimsy anywhere they're planted!
Also known as the Star of Persia, Alliums appear in mid-late spring from among dense clumps of grassy foliage that carry the family oniony smell. As unique and textural in the garden, these are incredible blossoms for focal points in mixed containers, as solitary grouped specimens, or as the feature in a grand bouquet!
Planting and Application:
Purple Rain Allium wants to make you laugh and feel joy in the landscape with its fun and whimsical blooms! Allium is an absolute must for Children's Gardens, Cottage borders, or Rock gardens, and even perennial gardens and mixed shrub borders can gain unique pops of color when interspersed throughout these gardens!
Create incredible container gardens with these wide-spreading fillers, even a window box or planter will become fanciful with these additions! Any sunny patio planter, balcony, or terrace garden becomes something fanciful! Allium looks fantastic as a designer addition to garden borders, especially when used in long, uniform rows or groupings to dramatically highlight these intriguing blossoms!
- Large Round Brilliant Purple Blooms Packed With Small Florets
- Bright Green Onion Like Foliage
- Summer Flowering Ornamental Onion
- Pollinator & Amazing Cut Flowers
- 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!
- 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
For an Allium that won't cause you any sorrow or pain, order the Purple Rain Allium from Nature Hills today! Your quality bulbs will ship to you at the perfect fall planting time for your growing zone!