Germinating mache and onion seeds

My garden plan has something to start every two weeks. This week I started germinating mache and onion seeds.

For the onion seeds, I added about 1/4 inch of vermiculite into recycled  plastic containers. Sprayed with water until saturated, and then dropped 125 seeds on top. After covering, I placed the containers on a heating pad. The silver insulation sheet on the heating pad helps to moderate the temperature to about 75 degF.