This is a frost-tender, late-summer or autumn flowering bulb. A gracious plant with slender iris-like foliage and pendulous, fan-shaped flowers in clusters on long stalks. The flowers have dark reddish blotches at their base and bear a sweet perfume. It's a cool and elegant plant, like a racehorse in a field of shires, very refined in outline in the season of big daisies and overlarge sunflowers.
height 90cm spread 30cm hardiness- tender conditions Found that on the webb hope it helps?

This is a favorite of mine. I bought the bulbs in Germany about 15 years ago, and as long as it gets full sun and kept warm, it will go for years. You can try it in a pot so that it can be moved inside, but when it is happy, it produces lots of little ones and soon crowds of little ones appear. So dig it up every year. But you cann't beat the smell.