Most vegetables – tomatoes, eggplants, broccoli, Swiss chard, peppers, and melons – are better off being put into the ground as starter plants and, therefore, can be seeded early indoors. If you have the space for this, you'll end up with stronger, healthier and more mature plants once it's time to move them outside. But you'll need special equipment like heat mats and ultra-violet lights and a little extra know-how. A simpler way to get a head start is to buy starter plants from your local garden shop and put them into the ground the same day. If seeding directly into the ground, pay special attention to timing. Vegetables such as lettuces, beets, and carrots are best planted as seeds directly into the ground because they're hearty against early season chill and don't like to be moved once planted.