milkmood said:I've come to the conclusion that the answer to my original question is unequivocally yes.
I started watching Professor Hooker's permaculture lectures this week and one thing I noticed is he apparently uses plants for ornamental purposes. One photo he showed was of a Castor Bean Plant that he says he planted for the texture, to add a little variety in the appearance of the garden. He even said at the end of the end of the video I just watched, that he believes we should strive to add beauty to the permaculture garden.