I purchased some onions to plant in a small planter on my apartment balcony. The planter also contains some lettuces/greens, parsley, basil, and sage. The onions came in a little box as nursery plants do, sprouted with long green stems, with perhaps 15 onion plants packed in very tightly, one next to the other. So far, I have transferred the onions from the little box directly into my planter as-is, but I feel this might not be right and wanted to get some advice.
My hope is to continuously harvest the greens of the onions, for use in salad, eggs, whatever, and occasionally harvest young onions when I want a bit more kick. If a few make it all the way through to mature onions, great.
What would be the best way to lay out these onions? Should I leave them in a clump, separate them out a little, spread them through the planter as singletons?