You can start seeds in almost any kind of container that will hold 1 to 2 inches of starting medium. Fill the pots almost to the top and pack lightly.
Drop 1 to 4 seeds onto the surface of the mix, spacing them as evenly as possible. Cover the seeds to a depth about three times the thickness of the seeds. Water gently until fully saturated.
Keep seeds cozy
Keep the environment humid by covering the flats with plastic or misting regularly. Place them in a very warm place, such as near a heating vent. Most seeds germinate well at about 70 degrees F. Keep moist but not water logged. As soon as sprouts appear, uncover and move the containers to a bright, cooler spot—a sunny window, a greenhouse, or beneath a couple of ordinary lights.
Lightly ruffling seedlings once or twice a day with your hand or a piece of cardboard helps them to grow stocky and strong. Harden off plants, about 1 week before the plants are to go outside, by gradually acclimating them to the outside. On a nice day move the containers to a shaded, protected place, such as a porch, for a few hours. Gradually increase the plants exposure to sun and breeze, except when the weather is horrible. At the end of the week leave them out overnight; then transplant them into the garden.
Read more in the March Healthy Belvedere Community Garden March Newsletter https://pahlga.org/wp-content/uploads/2013/03/Garden-Post-HBCG-March-2015.pdf