Keeping a mutated Dutch Iris white
Years ago,my grandfather propagated a mutated White Dutch Iris that he discovered in his field of blue iris. He was able to get a patent for it. I want to keep the Iris blooms white, but each year some of the flowers revert to the original blue. Should I cull those plants as soon as they open, so they won’t cross-pollinate with the whiter ones?
Multnomah County Oregon
You only need to worry about cross-pollination if you are harvesting the seeds to propagate. If you want to maintain the white, you should cull those bulbs that produce blue flowers.