My experience collecting T. hyacinthina seed is the plant is typically found in spring wet meadows, some locations indeed are completely dry in the drought of August. In cultivation however this species does quite well in well drained soil. Natural habitat requirements does not always translate to best garden condition. This is because competitive factors in nature determine success. At the nursery we have seen this mesic is ok with maintenance with many species of emergents, such as cattail and scirpus acutus. Rich Haard Bellingham, Wa., On Sep 27, 2013, at 4:02 PM, Jane McGary <janemcgary@earthlink.net> wrote: > Chris asked, >> This discussion reminds me of a question I have had about these >> species. I read that T. peduncularis and to a lesser degree T. >> hyacinthina are moisture-loving. Do they nevertheless require dry >> dormancy in the heat of summer? Regards, Chris > > No, both these species tolerate summer water as long as they are in a > well-drained site. However, they also tolerate dry dormancy. I have > grown both in both kinds of positions for many years. > > Jane McGary > Portland, Oregon, USA