Others, such as tomatoes, peppers, eggplant, corn and beans are warm weather crops and should only be planted when the weather is warm enough. Some vegetables such as leaf vegetables can be grown inside year-round with artificial light. Fruiting vegetables on the other hand cannot be grown indoors in the dead of winter, because they will not receive enough light, even with supplemental lighting, to produce fruit. Sow the seeds at the depth indicated on the seed packet. Put the containers in a warm place out of direct sun, away from any source of heat.
Most seeds like to germinate in a moist environment.
Once they have sprouted, move them to a sunny spot. Thinning is a job which is very hard for some of us to do. But it is vitally important. Overcrowding leads to malformed, spindly and small plants that yield little or nothing. Unless you have excellent conditions for growing transplants like a greenhouse has, it is advisable to purchase your transplants.