To keep things simple, I had originally decided not to start seeds indoors to create transplants. But this idea for onions, available on the Savvy Gardening blog - https://savvygardening.com/why-planting-onion-seed... - caught my eye. The blog post describes a method to start onion seeds in plastic containers outdoors in winter, and the transplants can be placed in the garden in spring.
Following the instructions, I created the seed container in January. Unfortunately in late March, it tipped over in a bad storm so I had to reconstruct it. Add that to the fact that I couldn't plant anything in the raised beds until early June (my cover crop mishap), and I was doubtful of a successful outcome since I was supposed to plant the onion transplants into the beds in early spring. But in early June, I went ahead and planted the small shoots from the container. As of today, it seems to be working!
The tops have grown substantially, and last week I noticed the bulbs starting to protrude at ground level. Was this normal or did I not plant them deep enough? It seems that this is normal. It's time to harvest - then cure - when more than half of the tops have fallen over and turned yellow. Not there yet, but I'm optimistic.
About 6 weeks ago, I saw something I'd never seen before: a foamy, tan colored blob about 5" long on the hardwood mulch in one of the garden beds. Since then, there's been more instances, some more yellow, some whiter, some browner.
Apparently, this is slime mold, sometimes referred to as "dog vomit" fungus. It feeds on bacteria in the mulch, and typically first occurs in very rainy weather or if an area is heavily irrigated. The foamy mass eventually goes away, especially if the weather turns hot and dry, and doesn't hurt anything. But if it is too unsightly for you, just scoop up the mulch with the mold on top, and discard in the trash.