@Sheridragonfly
Prayers for successful surgery and healing. I have been one who has enjoyed your pics of your Blue Ensign- glad Kermit could advise! My S Guaranitica (the one I planted last year and probably the regular species) has similar colored blooms (maybe darker, hard to tell from pics) and like many of the Guaraniticas spreads by runners. However I was pleased with the way it grows because new stems spring up fairly close to each other with some branching. Even though mine was acquired last July it got pretty full. Because of my zone it is still dormant but should reappear -Dottie of Gardens in the Wood of Grassy creek has had them in her garden for years and she is zone 6- she told me it is later in spring to return but once it does, it really takes off.
@Marilyn it looks as if Blue Ensign is hardy to zone 6 as well.