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Home All Products 'String Theory' (Amsonia)
'String Theory' (Amsonia)
'String Theory' (Amsonia)
'String Theory' (Amsonia)
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'String Theory' (Amsonia)

  • heat tolerant
  • resists deer

Full Sun
Part Sun
Height18 - 22 in
Spread36 in
Zones0405060708
Current Location:

String Theory Amsonia is a spring-flowering perennial that provides foliage and texture interest throughout summer. It has stunning light periwinkle blue flowers are produced above dark green, threadleaf leaves. It is heat tolerant and resists deer. Fertilize with Proven Winners Continuous Release Plant Food in spring.

  • 18-22 inches tall & 36 inches wide at maturity
  • Grow in zones 4-8
  • Partial to full sun (4+ hours) required

Care: Clean away any dead foliage after frost. Fertilize with Proven Winners Continuous Release Plant Food in spring.

Shipping Info: 

  • Enjoy free shipping on orders over $45
  • Size at shipping varies by the season and plant 
  • 1 Gallon plants are 6-14 in. tall and about 1-year old at shipment, varies by season and plant
  • 1 Gallon containers are 7.5 in. dia and 6.5 in. tall

    Read our guide to get started with planning a garden

    Features

    • Heat Tolerant
    • Resists Deer

    Characteristics

    • Hardiness Zones: 04 05 06 07 08
    • Height: 18 - 22 in
    • Spread: 36 in
    • Habit: Mounded
    • Bloom Color: Blue
    • Foliage Color: Green
    • Bloom Time: Spring-Summer
    • Plant Type: Perennial

    Garden Necessities

    Premium All Purpose Potting Soil, 1.5 cu. ft.
    Premium All Purpose Potting Soil, 1.5 cu. ft. from $24.99
    Continuous Release Fertilizer, 2.5 lb.
    Continuous Release Fertilizer, 2.5 lb. $21.29
    Water Soluble Fertilizer, 2.5 lb.
    Water Soluble Fertilizer, 2.5 lb. $19.99
    WaterWise® Drip Irrigation System
    WaterWise® Drip Irrigation System $49.99
    Twist 'n Plant® Original Gardening Auger
    Twist 'n Plant® Original Gardening Auger $40.99
    Proven Plants

    Trialed and tested for years, Proven Winners® plants continually out perform all others across the world in disease resistance, less maintenance, bloom coverage, and more.

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    Happiness Guaranteed

    If you're not happy, we're not happy. Simply contact us at (734) 654- 7485 or helpdesk@provenwinnersdirect.com. We are here to help your garden be successful.