Hi Garyp - I have not heard of this plant so looked it up in my RHS Gardening Encyclopedia- information as follows:
Genus of summer-flowering bulbs, suitable for borders and pond margins. Frost hardy. Requires sun or partial shade and deep, moist soil. Plant bulbs in autumn 10cm deep. Lies dormant in autumn-winter. Propagate by seed in autumn or by division in late summer. If seed is not required, cut off stems after flowering.
Hope this helps.