This is such an excellent plant for sunny, dry locations, screes and xeric gardens, I really wonder why it is not cultivated more. It has beautiful grey-green, linear leaves which form loose rosettes; the flowers stem arise in May-June – cylindrical racemes with rich, yellow fragrant flowers, followed by globose seed pods. I would cultivate it even just for the foliage, which looks best when grown in full sun.
The nicest specimens I’ve seen were in the Rock garden – scree area of the NY Botanical Garden. They can be quite effective used as specimens among other lower plants in a xeriscape/gravel garden.
Germination: warm germinator, sow in the spring. Seeds are collected from plants happily growing in zone 5, so seedlings will be readily adaptable to cooler areas.