Buy a Venus flytrap bulb. The most common, and easiest, way to start growing a Venus flytrap is to purchase a bulb (or several bulbs) from a company that specializes in growing the plants. Search online to find a vendor from which you can mail order bulbs. You'll be able to choose from among several varieties that have differences in shape and color.[1] You may also be able to find a nursery in your area that sells Venus flytrap bulbs.
While it's less common, you can certainly grow a Venus flytrap from seed as well - bearing in mind that it could take up to 5 years for the seed to become a mature plant.[2] Order seeds online and germinate them in deep pots filled with a seed substrate composed of sphagnum moss. Place the pots in plastic bags to keep the environment warm and moist. Once the seedlings have sprouted, you can transplant them to a more permanent growing medium.