Shining Blue Star (Amsonia illustris)

Shining Blue Star (Amsonia illustris)

4-star
:AMILL

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Binomial

Amsonia illustris
Shining Blue Star, sometimes called Ozark Blue Star, is a magnificent plant with three seasons of interest.  The clusters of blue flowers appear around Memorial Day and last two to three weeks.  The shiny foliage, with willow-shaped leaves, stays green through summer and turns a brilliant gold in the fall.

At three or more years, the plants can reach between three and four feet tall and be equally wide with a stout, vase shape.  Groundcover plants, like squaw weed (Senecio) and oak sedge (Carex albicans) can be used for weed control in the shade of blue star.

Shining blue star will handle almost any soil from dry clay to moist muck.  Extra fertilizer may cause it to flop over a bit.  It grows best in full sun to a few hours of sun.

It is a low-maintenance plant needing to be cut back to the ground in late winter before new growth occurs in spring.  If height becomes an issue, it can be pruned back a third or a half in mid-summer, and new growth will appear almost immediately.  You will seldom have reason to water this tough, hardy perennial.

Uses:  hummingbirds, butterflies, rain gardens
Height:  30 - 48"                Space:  36 - 48"

Moisture:  Average to moist                                            
Light:  Sun to light shade

Look for ripe seed in September and stratify for 7 weeks.
  • 2,550 seeds per ounce
  • 1 ounce per 70 square feet
  • 35 pounds per acre
5 Stars
Spectacular flowers
The blue flowers are real show stoppers, just wish it flowered for a slightly longer period. Plant has excellent overall shape, foliage is very attractive and turns a nice golden/yellow in the Autumn.
Did you find this helpful?  1 of 1 Found Helpful
Reviewed by:  from Fenton. on 9/3/2015
5/5

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