floota,
I am glad you mentioned the spacing. With my first few daylilies space was not a problem, so I just spaced them here and there throughout the beds. Then when I created a daylily only bed I planted them very close in order to get more plants in the bed and they were small young plants, so maybe 12 to 14 inches. As they grew I realized they were too close so I moved up to 18 inch spacing. Well, now I have gone to 24 inch spacing, and from your post, it looks like three foot spacing might be in my future. After all, large beautiful clumps were high on my priority list but that eats up the space pretty fast. I have done the arrangement by height thing and it works sometimes, but then it sometimes gets to be too"arranged" looking (coming from someone who is known for planting in rows like soldiers : my wife's description). But I think with the further spacing the arranging by height becomes less necessary as the extra spaces between plants allow for the smaller plants to be seen from different angles.