Tigridia

We planted some Tigridia this year; It was at the end of June we did it and for a while we thought they wouldn't bloom. But they started a couple of weeks ago. The flower only lasts for 1 day. At first we thought they'd all be yellow but today we got some other colors; maybe there will be more vairety - buds are still forming. Instructions about wintering are contradictory; we'll mulch.