Amsonia hubrichtii (Arkansas bluestar) is an amazing perennial, inexplicably underused in the gardens. It forms a round, bushy clump of stems with very narrow, thread-like leaves which are changing colours throughout the year like a chameleon, from green to yellow, to shades of russet!
Light blue flowers in early summer combine well in the garden with almost anything, but you will really want to place it strategically for some breathtaking fall foliage colour combo. After flowering it can be sheared back to keep it compact, but it’s usually not a problem when grown in full sun.
Germination: first time I will do it from seeds myself; info around the web goes that it needs a period of cold/moist stratification, meaning sow in late fall outdoors or provide stratification in the fridge if sowing in the spring.