String Theory Amsonia
Amsonia x 'String Theory' PP34419
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String Theory Amsonia - #1 Container is backordered and will ship as soon as it is back in stock.
Plant Sentry™
Plant Sentry™
Plant Sentry is designed to protect both consumers and the nursery trade from invasive plant pests and diseases. Sites that display the Plant Sentry protection badge are protected from consumers buying and nurseries shipping material carrying invasive pests and diseases.
This proprietary eCommerce software prevents the shipment of a restricted plant to each state. The Plant Sentry system includes a shipment certification program. The Plant Sentry Compliance Officer works closely with NatureHills.com and each nursery or fulfillment center to ensure only compliant plants are sold to customers.
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Delivery and Shipping
Delivery and Shipping
Shipping
To obtain a more accurate shipment time-frame, simply enter your zip code in the “Find Your Growing Zone” box to the right. Our plants are grown all over the country and lead time on items may be different because of this. Once your order is placed, you will also receive the specific shipment time-frame information as part of your order confirmation. Once an item ships, you will receive shipment notification and tracking numbers, so you can follow along while your plant travels to your doorstep. We use FedEx, UPS, or USPS at our discretion.
Due to winter weather we have put a hold on shipping to the areas shown below in grey. You can still order now and we will ship the plant to you during an appropriate time for your zone.
Standard Shipping Rates
At Nature Hills we handle, package and ship the products you order with the utmost care to ensure healthy delivery. Shipping and handling charges are calculated based on the tables below. Please note that some items include an additional handling surcharge, these will be noted on the item's product page.
| From | To | S&H |
|---|---|---|
| $0 | $19.99 | $24.99 |
| $20 | $49.99 | $29.99 |
| $50 | $69.99 | $34.99 |
| $70 | $99.99 | $39.99 |
| $100 | $129.99 | $44.99 |
| $130 | $149.99 | $48.99 |
| $150 | $150+ | Approx 28% |
Click here to see our full rates
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
String Theory Amsonia 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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Mature Spread
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Sun ExposureFull Sun, Partial Shade
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Moisture
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Soil
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Growth RateMedium
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Flower Color
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Fall Color
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Pollinator Friendly
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Fragrant
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Pruning Time
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Bloom PeriodLate Spring, Summer
Growing Zones
A new Amsonia from Proven Winners®, the String Theory Amsonia PP#34419 (Amsonia x 'String Theory') is a soft powdery baby blue, densely-packed, rounded blossom that whimsically dances above the upright vase-shaped slender thread-like foliage of this new perennial cultivar!
Appearing in round clusters just above the foliage, the star-shaped florets bob and wave in the breeze throughout the late spring and early summer weeks. Almost resembling Allium, the bees and butterflies will show up strong for the rich nectar and pollen. The slender stems make String Theory great for cut flowers too!
Also known as Willowleaf, Dogbane, Star-Willow, and Blue Star (Bluestar), Amsonia is native to the Southeastern US and this cultivar brings a world of new interest to the many, already fantastic qualities of these perennials! Hardy throughout USDA planting zones 4 to 9, meaning they are wonderfully cold-hardy and heat-tolerant!
Landscape Application:
String Theory Amsonia is a lower-growing perennial, topping out at 18-22 inch height when in bloom, yet creates drifts 30-36 inches wide. The politely spreading form readily creates seas of soft blue throughout your sun or partially shaded garden beds and borders! Go for a meadow or woodland look without worrying about deer!
A must-have for Pollinator and Cut Flower gardens, these front to mid-garden specimens and accent plants fill Cottage borders and mixed Perennial gardens in sky-blue color and verdant greenery! Add this whimsical Dr. Seuss plant to Children's Gardens and fun informal plantings! Mix with spiral topiary evergreens, Alliums, Corkscrew Rush, Buttonbush, Hollyhocks, Weeping Trees, and lollypop-trimmed Rose Trees for a quirky display.
String Theory Blue Star even pops well in small and large planters!
- Soft Sky Blue Rounded Flower Clusters & Star-Shaped Florets
- Vase Shaped Upright Bright Green Thread-Like Foliage
- Late Spring to Early Summer Bloom Time
- Pollinator-Friendly!
- Unusual Cut Flowers
- Fanciful Specimens, Drifts, Container Accents & Mixed Sun Gardens
#ProPlantTips for Care:
Amsonia is very low maintenance and easy to grow! Provide a well-drained area in full sun or partial sun areas and water them regularly until established. Although Blue Star is adaptable to a little light shade, too much shade will cause these perennials to flop, so please choose its location carefully. It will show tolerance to drought but protect your investment in long periods without rain by providing water and a 3-4 inch deep layer of mulch. The only pruning necessary is to cut the seed heads off in the fall and trim back the foliage in the early spring.
- Full Sun & Part Sun
- Well-Drained Soil
- Moderate Moisture Needs
- Deadhead In Fall/Prune In Spring
- Deer Seldom Bother These Perennials
Fat round blue stars and thread-like greenery - choose something fun this year and order the Proven Winners® String Theory Amsonia Blue Star for your landscape! Now available at NatureHills.com!
