Noteworthy Characteristics. Amsonia hubrichtii, commonly called bluestar, Arkansas amsonia or Hubricht's amsonia, is an uncommon perennial that is native to the Ouachita Mountains in central Arkansas.It is very similar in appearance to the Missouri native Amsonia ciliata, except the leaves of A. hubrichtii are more narrow and thread-like.
Water slowly and deeply when the surface of the soil feels dry, allowing the soil to absorb as much moisture as possible without becoming soggy. Discontinue watering in fall.
After new leaves have emerged, apply a water-soluble fertilizer with 50-100 parts per million nitrogen at each or every other irrigation.
An ideal soil would be made up of 45% minerals (sand, clay, silt), 5 % organic (plant and animal) material, 25% air and 25% water. The mineral portion would be loam (20 – 30% clay, 30 – 50% silt and 30 – 50% sand).
This plant grows fairly large but it will not need to be divided for many years. Cutting the stems back to within six to eight inches off the ground after flowering will result in fuller growth. Plants must be cut back in either the late fall or late winter to about 8 inches from the ground.
After plants are watered in, the growing medium should be allowed to dry thoroughly between waterings. After new leaves have emerged, apply a water-soluble fertilizer with 50-100 parts per million nitrogen at each or every other irrigation. Maintain a growing temperature of 55°F-65°F.
