I started a large variety of plants and all have germinated very successful except for one, and that is my lettuce. I have read different ways to do it, one being putting the seeds directly on top of the soil, covering them with saran rap and putting them under the grow light. four days later and only 1 or 2 seeds have actually done anything at all. The other way was to cover the seeds with 1/4" of soil and put under the grow light. This method yielded me a good germination of my red romaine lettuce, but not my iceburg or butter crunch. This is the first time I have ever grown lettuce, and I'm really not sure what I'm doing wrong.
I didn't find the right solution from the internet.