Plant seeds early by starting them indoors. This head start on the growing season is especially effective if you live in a northern location with a short growing season. Indoor seeding can be used to start vegetables or bedding plants. Choose seeds that germinate quickly into easy-to-care-for seedlings and plants. If this is your first effort at starting seeds indoors, choose sunflowers, marigolds, zinnias, beans or zucchini.
Choose seeding containers such as recycled yogurt, pudding or sour cream containers. Alternatively, find seeding trays or peat pots at your local garden center. Any of these containers work equally well for starting seeds indoors.
Fill the seeding containers with potting soil, up to ½ inch from the rim. Moisten the soil with 2 or 3 squirts from the water bottle sprayer. Use your finger or the end of a pencil to stir the soil, spreading the moisture throughout.
Follow the directions on the back of the seed packet for planting depth. Different plant seeds require various planting depths. Use the end of the pencil to poke a hole in the soil of each of the seeding containers. Place a seed in each hole. Push some potting soil over the tops of the holes.
Place the seeded containers onto a tray. Cover the containers with a length of clear kitchen plastic wrap. This will keep the soil moist and warm, required elements for seed germination. Commercial seeding trays come with a tray and clear plastic cover. Place the tray near a sunny window that gets at least six hours of daily sunshine.
Spray the soil lightly if it dries. Remove the plastic covering as soon as you see green sprouts coming through the soil. Check the soil often, keeping it moist with a squirt from the water sprayer. When the seedlings are 3 to 5 inches high and the last frost has passed, transplant them outdoors.