Giant Cobalt Blue Grape Hyacinth
Muscari 'Cobalt Blue'
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Giant Cobalt Blue Grape Hyacinth 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
Giant Cobalt Blue Grape Hyacinth highlights at a glance!
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Botanical Name
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Growing Zones4, 5, 6, 7, 8, 9, 10
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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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Flower Color
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Pruning Time
Growing Zones
Bold beauty in a small containable size! The Giant Cobalt Blue Grape Hyacinth (Muscari 'Cobalt Blue') are dramatically pure cobalt blue spires packed full of bell-shaped blooms along the entire little stem! These fragrant blooms start opening from the bottom up, forming a slight white edge to the petals as they mature.
Muscari are typically a demure blooming bulb plant but Giant Grape Hyacinth can reach 10-14 inches in height! Keeping the family's bunching and naturalizing nature and spikey short slender green foliage look great long after the spring display unmatched by any other Muscari variety.
This brings unique delight in the spring and food for pollinators! Giant Cobalt Blue Grape Hyacinths are cold and heat-hardy throughout USDA growing zones 4 - 10, forming tidy little bunches that expand each year, these perennial bulbs are incredibly easy to grow and very low maintenance!
Planting and Application:
Cobalt Blue Muscari is a great choice for almost any low-lying purpose. Adding one more front layer of color to your spring garden, these flowers are happy to oblige. An absolute must-have garden gem for the Rock gardens, Cottage gardens, and look luxurious in spring ephemeral borders! Amp up this dramatic blue hue by planting in groups and among other Muscari varieties! They spread and fill in, so give them about 4 inches between bulbs to do so.
Indoors, you can force these incredibly vibrant blue bulbs in a shallow dish or container for winter décor! They add delicate delight to floral arrangements or container gardens, and they have a pleasant scent. Create incredible container gardens with these vertical thrillers, even a window box or planter will become fanciful with these additions! Any sunny patio planter, balcony, or terrace garden becomes something spectacular!
- Stunning Fragrant Clusters of Dark Cobalt Blue Flowers
- Spring Blooms & Green Foliage Clumps
- Easy to Grow Naturalizing Perennial Bulbs
- Pollinator-Friendly & Amazing Cut Flowers
- Great in Containers, Front of the Border, Spring Color & En Masse
#ProPlantTips for Care:
Muscaris are easy to grow! They like early spring rains and water when the skies don't open up. While these bloom best in full sun, planting them under trees can be a great idea as the bulbs will bloom before the trees leaf out. Then, once the blooming is done, the shade of the trees can protect the bulb's foliage, giving the bulb more energy for next year's stunning blossoms! Fall-planted bulbs need well-drained soil with 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. Their blooms last for weeks and they naturalize and spread over time unless you deadhead after the flowers fade.
- Full Sun For Strongest Growth
- Well-Drained Soil
- Moderate Moisture Needs
- Deadhead After Flowers Fade & Prune Mounds After Leaves Yellow
- Deer Seldom Bother Them
Big blue and bold, the Giant Cobalt Blue Grape Hyacinth will add incredible depth and drama to your garden! Be the first on the block to enjoy these large Muscari and incredibly blue bulbs are now available at Nature Hills! We will ship your bulbs based on the correct planting time for your growing zone!
