The onions sound interesting.
I'm going to try an experiment this year. My veggie and herb garden will be grown up on my deck in small plastic barrels, and in deck railing boxes.
I had a wonderful veggie and herb garden at my old house for the last 25 years. It was 4 meters wide by 12 meters across, and it was completely organic. I did not use any chemicals of any kind, and only amended the soil with my giant compost pile and organic peat moss.
But ever since I moved up into the mountains, I haven't been able to grow anything because it would need a fortress-like enclosure in order to keep out the bears, deer, woodchucks, turkeys, skunks, and raccoons.
But my deck has a bump out where a hot tub used to be (I had the hot tub removed last year. I hate sitting in boiling water. You might as well chuck in a mirepoux and bouquet garni and make soup), so I'm planning on putting in 4 or 5 tomato plants and 3 or 4 hot chili plants in buckets, and then herbs in the railing boxes such as thyme, sage, rosemary, parsley, cilantro, and chives.
I'll post a pic if I can pull it off.
My wife thinks I'll only be inviting the animals up on the deck. We'll see.