I have a few water iris that went to seed, but the seed pods are still green and haven't done anything yet. Does anybody know when the seed pods will turn brown or be ready to harvest the seeds? I have heard that it is best to not let it go to seed and let the plant concentrate on spreading by rhizome, but they are in an area where I don't care how slowly they spread. So I decided to experiment by letting them go to seed.
Home & Garden Design, Atlanta - Danna Cain, ASLA