@Hammerofjustice - thanks for your post #2612688 - that is a tremendously useful trove of companion planting knowledge, and
@dewayx - thanks for bringing up the question that Hammer answered so well.
Perhaps not as useful as Hammer's post, but there's a supposedly dwarf form of pink Cosmos bipinnatus that would, in my opinion, be especially lovely with the purple-leaved asparagus. This hopefully shorter cosmos wouldn't add tussling with stakes to other garden chores. I bought a bulk package of these seeds from Eden a couple of years and will be listing them here.
karen