It has been taken up by the horticultural trade in Europe as a rock garden plant, with good reason!
There are a couple of tidbits of folklore around Midsummer's Eve (coming soon) and the longevity of the picked stalks. A stalk placed on the windowsill will turn during the night towards the direction from which your lover is to come. Another tale is that a young woman would pick two stalks; one representing herself, the other, her lover. The length of time "he" lasted was an indication of his fidelity.