I think the idea is, we tell about our own plants and read everyone's evaluations of theirs so we know how other people's plants are doing in gardens across America ( and elsewhere!) The problem with picking random Daylilies is that there is no guarantee that anyone has them or has any info about growing them, so the slot is wasted. In evaluating your own cvs, you are providing others with information that's hopefully useful to them, in case they are considering purchasing the plant.
