I have what was supposed to be Grand duke of tuscany ( several whorls is what I believed it to be ) but found out recently that the flowers have just 2-3 whorls. Any idea what variety/cultivar this could be?

Another plant (also grand duke, from differnt source) is healthy buy has not produced flowers yet. It is in full sun and is looking healthy, just no blooms yet. Any suggestion to bring it to bloom will be greatly appreciated.

Thanks,

M