VANDERMEER

PLANT LIBRARY

Find the perfect plant for your space by browsing through this extensive selection that we typically carry every year.

This library is for information purposes only.

 
perennial

String Theory Blue Star

Amsonia 'String Theory'

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String Theory Blue Star (Amsonia 'String Theory') at Vandermeer Nursery

String Theory Blue Star flowers

String Theory Blue Star flowers

(Photo courtesy of NetPS Plant Finder)

String Theory Blue Star (Amsonia 'String Theory') at Vandermeer Nursery

String Theory Blue Star in bloom

String Theory Blue Star in bloom

(Photo courtesy of NetPS Plant Finder)

String Theory Blue Star (Amsonia 'String Theory') at Vandermeer Nursery

String Theory Blue Star

String Theory Blue Star

(Photo courtesy of NetPS Plant Finder)

Height:  22 inches

Spread:  3 feet

Sunlight:  full sun  partial shade 

Hardiness Zone:  4a

Other Names:  Blue Milkweed

Brand:  Proven Winners

Description:

Star shaped, sky blue flowers in terminal clusters appear in spring over threadlike foliage that forms an upright, rounded mound; beautiful fall color in tones of yellow-gold with orange highlights; great for borders, mixed beds, or a native garden

Ornamental Features

String Theory Blue Star has clusters of sky blue star-shaped flowers at the ends of the stems from late spring to early summer, which are interesting on close inspection. The flowers are excellent for cutting. Its narrow leaves are dark green in colour. As an added bonus, the foliage turns a gorgeous harvest gold in the fall.

Landscape Attributes

String Theory Blue Star is a dense herbaceous perennial with a mounded form. It brings an extremely fine and delicate texture to the garden composition and should be used to full effect.

This is a relatively low maintenance plant, and should be cut back in late fall in preparation for winter. It is a good choice for attracting bees and butterflies to your yard, but is not particularly attractive to deer who tend to leave it alone in favor of tastier treats. It has no significant negative characteristics.

String Theory Blue Star is recommended for the following landscape applications;

  • Border Edging
  • General Garden Use
  • Naturalizing And Woodland Gardens

Planting & Growing

String Theory Blue Star will grow to be about 18 inches tall at maturity, with a spread of 3 feet. Its foliage tends to remain dense right to the ground, not requiring facer plants in front. It grows at a slow rate, and under ideal conditions can be expected to live for approximately 20 years. As an herbaceous perennial, this plant will usually die back to the crown each winter, and will regrow from the base each spring. Be careful not to disturb the crown in late winter when it may not be readily seen!

This plant does best in full sun to partial shade. It prefers to grow in average to moist conditions, and shouldn't be allowed to dry out. It is not particular as to soil pH, but grows best in rich soils. It is quite intolerant of urban pollution, therefore inner city or urban streetside plantings are best avoided. Consider applying a thick mulch around the root zone over the growing season to conserve soil moisture. This particular variety is an interspecific hybrid. It can be propagated by cuttings; however, as a cultivated variety, be aware that it may be subject to certain restrictions or prohibitions on propagation.

 
 
Hardiness Zone Plant Height Minimum Sunlight
Characteristics
Edging  Garden  Naturalizing 
Applications
Flowers  Fall Color  Texture  Attracts Wildlife 
Ornamental Features

** Plants listed may not be in stock at all times. **

Please contact us directly for current stock availability.
 
Our inventory varies seasonally and we cannot guarantee that every plant will be in stock at all times. To confirm if we have the plant that you're looking for, please call (905) 427-2525 or e-mail  us at info@vandermeernursery.com.
 
Remember, this library does not include our entire selection. Visit us year-round to check out varieties that may not be listed here!