Radius Astilbe
Astilbe x 'Radius'
- Stay Protected with Plant Sentry ™
Radius Astilbe is backordered and will ship as soon as it is back in stock.
Plant Sentry™
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
Radius Astilbe highlights at a glance!
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Brand
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Botanical Name
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Mature Height
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Mature Spread
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Sun ExposureFull Shade, Partial Shade
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Moisture
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Soil
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Growth RateMedium
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Pruning Time
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Bloom PeriodSummer
Growing Zones
Cold-hardy and bold red plumes, the Radius Astilbe (Astilbe x 'Radius') is an outstanding new hybrid False Spirea that kicks off the spring when the foliage emerges dark red before maturing to dark green for the rest of the growing season!
Radius blooms profusely in mid-summer when the dark-red flower buds open to deep rose-red plumes that butterflies and hummingbirds love! Radius blooms are slightly fragrant and make great cut flowers for bouquets and can even be dried for botanical arrangements.
Amazingly cold-tolerant throughout USDA planting zones 3 to 8, Radius grows tall at 18 - 24 inches on strong stems, but spreads into lacy mounds 16 to 20 inches wide! Also known as Meadowsweet and False Spirea, Astilbe are hardy perennial plants that are easy to grow!
Landscape Application:
These showy red blooms look incredible in your informal and formal shade garden spots, bringing in the butterflies and hummingbirds to your perennial and cottage borders, cut flower gardens, and beneath the understory of woodland garden settings.
This is a spreading herbaceous perennial that will fill in quickly wherever it's happy! Creating easy mass plantings and drifts! Line walkways and the shady side of an evergreen hedge with these versatile perennials! It looks fantastic in big drifts in the shade border or under big trees where other plants might struggle.
On the flip side, Radius is a must-have bold addition to smaller gardens, covered seating areas, and decks, or your shaded porches, both in the ground or in mixed planters and containers! Astilbe are frilly foliage accents with outstanding summertime blooms that work beautifully as edging and finishing touches around the landscape!
- New Spring Red Foliage Matures to Green
- Mid-Summer Red Plumes
- Fragrant & Attracts Butterflies & Hummingbirds
- Lacy Finely-Cut Foliage
- Sized for Smaller Gardens, Balconies, Patios & Containers
- Perfect For Shady Borders & Beds & Massing
#ProPlantTips for Care:
Astilbes are long-lived perennials that are most comfortable when grown in rich soil and light shade to filtered sun. They will grow in full shade in the hottest of their favorite growing zones, but will not bloom as prolifically there. Though they are easy to grow, Astilbes have one critical requirement - consistently moist soil as drying out leads to a quick loss of flowers and eventually stress.
Provide mulched beds for insulation and to increase the organic matter in the soil, while holding in moisture consistently! Deadheading cleans up the mounds and you can use the dried blooms in bouquets, or leave the dried seed heads intact to provide late-season interest. Cut back hard in spring before new growth emerges and fertilize at this time too.
- Partial Shade Perennial
- Well-Drained Soil That's Organically Enriched
- Consistent Moisture Access
- Prune Early Spring Before New Growth
- Herbaceous Perennial Comes Every Year
- Resists Rabbits & Deer
Bold red flowering plumes, the Radius Astilble will light up your shaded garden areas with its impressive flowers and lacy foliage! Hurry and order yours today at NatureHills.com!
