Starting seeds indoors is a lot cheaper than buying full-grown plants. Just sprinkle the seeds in a large container, and let them grow. When they are large enough, transplant them using a method called "pricking out."
Pricking out
Before you move the plants over, fill some pots with a good potting soil. The pots must be sterilized if you used them last year. To sterilize, mix them in a solution of nine parts water and one part bleach. It gets rid of all disease and fungus.
Now you're ready for the plants. With a pencil, carefully "prick out" an individual seedling--tease the seedling out of its nesting area and lift it gently by its leaves. Then with the same pencil, create a small hole in the new potting soil and place the tiny seedling inside.
Start introducing the transplants to sunlight, gradually increasing their exposure. Keep them well watered and fertilize every other week with a water-soluble fertilizer at half strength. And in no time, once all threats of frost are gone, these babies will be ready to plant in your yard.