I did it. I planted some seeds yesterday. I had to; it was April 1st. Some of them will do fine: They're inside where it's warm. The ones I planted outside, it's anybody's guess whether they will live. I covered them with gardening fabric, and before I planted them I was amazed to find that the earth was warm and friable to a good depth where I planted them. Other parts of the garden (especially the parts under that thick bed of straw I put down last fall) were frozen solid. The things I planted are cold-lovers such as lettuces, spinach and dandelion greens, and I noticed that a few seeds that had dropped from last year (I think sunflowers) had just recently sprouted out there, and certainly some weeds were growing already. I pulled away some of the straw, and in some places it was warming up. I was thrilled to see lots of earthworms at work. I wasn't thrilled to see one big fat slug already. I've read that a down side of the lasagne-style gardening is it creates an environment in which slugs thrive, at least for a period of time. I have a product, though, that is environmentally safe and works wonders against slugs: Escar-Go! (I love the name.) I'm also putting out a couple of toad houses, and I hope a couple will move in.
So fingers crossed, but if they don't survive, it's no big deal. It cost me pennies, and I enjoyed every minute of plunging my hands into the sweet dark earth. It's what I do.