I remember when this hit the horticultural headline back in the 1980's. Having grown this half hardy annual plant in a border I can vouch for its usefulness. A broad plant, slim stems spring upwards, clothed in round, purple-tinged, mid-green leaves and ending in small purple flowers. (15 seeds per packet).
Either sow indoors any time between November and March, or outdoors where they are to flower from April. This can be slow to germinate, particularly as the outer coat of the seed is thick. They benefit from being sown in a moist soil, or being soaked before sowing.