onion seed failure
We planted three different kinds of onion: candy, patterson, and claret. All were planted in a type of peat based potting soil mix that we have used to start all our other seeds for years. They were started in some aluminum pans with a soil depth of about 3". Initially we had the pans in the basement where it was cooler, but were getting no germination. We moved them upstairs into the warmth and germination was pretty uniform.
Being concerned that they were maybe getting too much light, we moved them back downstairs on heat mats and under grow lights which are on about 10 hours a day. Today it appears that practically all have died.
Any thoughts as to what might have gone wrong? Luckily, we've still got some seed that we were going to direct seed as a test to see how much the advance germination helped us. I guess I could still buy more seed, but I'd like to figure out what went wrong if I can.