Make 10 small holes in the bottom of the container. Fill the tray with the gravel first, and then with the mixture of soil and sand.
Place the seeds on the soil and gently push them with a pen, but not all the way into the earth! They should still be visible. Spray the container until the soil feels well moist, and put the lid on the growing container.
Put the container in a warm place, such as wrapped in an electric blanket or next to the heater.