@Former-Member, I don't think I'd try onions with asparagus, because they'd still be growing when the asparagus sprouted in spring, and they might be competing with each other. I think the onions would come off second best. Pansies are low growing, so they should work nicely. Some of the smaller types of looseleaf lettuce might do OK too.
Have begun planting over chookie's spot. So far, a Chinese Cabbage, primulas, cornflowers, dill, and some teeny tiny poppies that I transplanted from the next spot I'll be working on. I've left a spot in the middle for larkspurs. I also planted a bit more Printanoor garlic, which by now is starting to sprout. And bought some more plants and seeds today. Hostas, a lemon melalucea, a heuchera, an abutilon, "Pizza Thyme" (prostrate culinary variety), some aquilegia seedlings... peony poppy, Oriental poppy and snapdragon seeds. I haven't succeeded with Oriental poppy seeds in the past, but at $3 something a packet, I'm willing to risk another try.
Previous plantings are all "so far, so good", so I'm hoping I'm on track for that colourful spring. A few tulip shoots are showing, and the ranunculas have sprouted. 🙂