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Amsonia 'String Theory'


Amsonia 'String Theory' is a hybrid blue star displaying star-like baby blue flowers above dark green threadleaf foliage.

Amsonia 'String Theory' is an exciting hybrid blue star to add to your garden's repertoire. This cold hardy, low maintenance perennial surprises with dark green, threadleaf foliage bearing panicles of star-shaped, baby blue flowers from late spring to early summer. The foliage remains attractive into autumn and then takes on golden orange hues. Plants will form clumps up to 22 inches tall and 36 inches wide. Delightful in the mixed border and as a mass planting. Deer resistant.

Common Name: Blue Star

Family: Apocynaceae (The Dogbane Family)

Zone Hardiness: 4-9

Light: Full Sun, Part Sun, Part Shade

Height: 12-24"

Width: 2-3'

Primary Bloom Colour: Blue

Secondary Bloom Colour:

Class: Deciduous

Type: Perennial

Bloom Time: Late Spring

Soil Moisture: Average, Moist, Drought Tolerant, Dry

Stem Colour:

Fragrance: No


Benefits: Butterflies, Bees

Deer Resistant: Yes

BC Native: No

Native Habitat:


Geogrpahical Origin: Americas - North America

Miscellaneous - Garden Origin

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*The Plant Encyclopedia is updated each year to provide a representation of the plants we offer, have offered, and may offer again. However, it is not a live inventory of our stock. Not all plants will be available at all times or in every year. Use the link above to enquire about the availability of this plant. Additionally, we carry many plants that have not yet been entered into our database so please enquire if you don’t see what you’re looking for. Plants are available only for on-site sales at our nursery in Richmond, BC, Canada or for shipping within Canada. We do not ship internationally. However, if you are visiting the nursery from afar, we can arrange for the necessary permits and paperwork for you to take plants back with you to your country.