String Theory Amsonia

Proven Winners

$29.99
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SKU:
AMSTY
Availability : In Stock

Ships Week of 5/23/22

$29.99
  • Partial Sun to Full Sun (At Least 5 Hours of Direct Sunlight)
  • Mature Height 18 - 22 Inches
  • Mature Spread 18 - 22 Inches
  • Growing Zones 4 - 9
  • Use As A Thriller In Containers

Boasting a light blue flower atop dark green threadleaf foliage, this late spring to early summer flowering perennial will provide color and soft texture to your garden. In the fall, the foliage will turn from dark green to a brilliant orange. It can grow to a compact height of up to 22” and a spread of up to 36”. This easy to maintain plant will be an excellent addition to any garden.

Native to North America, this perennial is deer resistant and tolerant to moderate heat and humidity. Compact growth habits will create a visual appeal without too much pruning or shaping. Does great in mass planting, border planting and overall landscaping. Providing a splash of color and texture that will complement other flowers and foliage, it does great as a cut flower in floral arrangements. This plant thrives in average soil without much care, nor attention.

String Theory Amsonia Care

Planting in either poor or average quality soil will render the best results within the foliage and flowers, alike. A neutral pH of 7.0 is recommended for the soil for best results. It Is best planted in either partial or full sun. If the soil is too fertile or in too much shade, the compact habit is less likely to continue as the plant loses its shape by becoming droopy. Consistent watering is best for maintaining moist soil, but do be careful not to overwater.

After flowering, cut the stems down to about 6”-8” from the ground to encourage prolific flowering for the next spring. The growth habits of this plant provide you with peace of mind that you will not need to be endlessly dividing the individual plants to create space for new growth. After several years, plant division is recommended to maintain a healthy root system.

String Theory Amsonia Spacing

This is a compact, medium sized perennial that does well planted on its own or as a border plant. Growing up to 36” wide, the plant spacing is recommended to be 32”-36” on center.

String Theory Amsonia Information

USDA Hardiness Zones: 4 - 9
Plant Type: Bushes
Light Exposure: Partial Sun to Full Sun (At Least 5 Hours of Direct Sunlight)
Mature Height: 18 - 22 Inches
Mature Spread: 3 Feet
Spacing: 3 Feet
Habit: Mounded
Flower Color(s): Blue
Flower Description: Light Periwinkle Blue
Bloom Period: Early Summer To Late Spring
Foliage Type: Deciduous, Herbaceous
Foliage Color(s): Green
Foliage Description: Dark green
Seasonal Interest: Spring Flowering, Summer Flowering
Watering: Average
Resists: Deer
Tolerates: Heat
Attracts: N/A
Container Role: Thriller
Uses: Borders, Containers, Mass Planting, Specimen or Focal Point, Wildlife Gardens
Features: Low Maintenance, Native to North America
Brand: Proven Winners
Common Name: String Theory Amsonia
Other Name(s): Bluestar
Scientific Name: Amsonia hybrid USPPAF, Can PBRAF

Click here for more information on plant container sizes.

Plant Addict Guarantee (Included On All Plant Orders)

Plant Addicts guarantees your plant(s) will arrive happy and healthy, but the plant(s) are being shipped through the mail and accidents happen. If the plant is dead, has dried out roots or the incorrect item was shipped just notify Plant Addicts within 3 days upon delivery. We may ask for pictures but will try to make it as easy as possible for you. Please note plant(s) with damaged branches or wilted leaves will not qualify for this guarantee. Plants are very resilient and will rebound quickly when cared for correctly.

For information on how to care for you new plant please check out our guide. Guide: How to Care for Your New Plant(s)

Plant Addicts Warranty - 1 Year (Extra Purchase Required)

We encourage all plant lovers to purchase the Plant Addicts Warranty whether you’re new or an expert. There are many variables outside our control and yours that can cause the demise of your plant(s). Examples would be hungry animals, drought, poor soil conditions, over watering, disease, insects & many other factors. The Plant Addicts Warranty is a 1 year warranty protecting you from all the unknowns and will replace your plant if it moves on to the plant afterlife.

The warranty is purchased on a per plant basis and must be purchased at the same time as the plant purchase. We will cover 100% of the price of the plant but the warranty does not cover shipping cost. Simply let us know if your plant has died within one year of receiving it and we’ll get you a new one shipped out. We may ask for photos for documentation purposes but again we’ll try to make it as easy as possible.

For more information, please go to our Shipping & Returns page at the bottom of the website.

Guide: How to Care for Your New Plant(s)

Planter Shipping

Standard Colors: 2-3 business days

Special Order Colors: 8 weeks - this is due to the planter being custom made with the color(s) of your choice

Please Note: On special orders there can not be any cancellations

Plant Shipping

Time of Order:

Summer Shipping

  • If there is extreme heat we’ll delay shipping.  
    • We’ll have to review what areas the plants are traveling through along with your location


Once your plant is shipped you’ll receive an email with tracking information. Depending on the above criteria we’ll ship your plant(s) towards beginning of the following week from your order. We put together this helpful guide of what to do when you receive your plants in the mail.

It is important to know that all of our plants are clearly labeled for which growing zones the plant can survive in. The plants are thoroughly trialed and tested in every growing zone before we state the plant can grow in a zone. Again, our #1 priority is to ship the plants to you healthy and ready to thrive in your location. So we will do everything in our power to do so.