Dear David and List, Let me clarify, all the plants have all their flowers open on the same day, then about a week later they will all have their flowers open again on the same day, this usually continues for about two months. I have close to 200 plants of Neomarica caerulea in the nursery, it is a truly spectacular sight when they are all open, there can easily be 1000 flowers open at one time! All of my plants are a single clone, which I've been propagating for a number of years. My plants do set seed, but some years there are less seed than other years. I've found that Neomarica candida (N. gracilis?) does the same, but usually not on the same day as N. caerulea. Hence I've not managed any hybrids myself, but I think there is quite some potential there to produce hybrids. Most Iridaceae apart from Iris has largely been left neglected by the plant breeders. Kind regards, Pieter van der Walt (South Africa)