Locate an area. In your yard find a place that is well serviced by the sun. Thyme likes to be bathed in sunlight. Mark at least a 4 foot by 4 foot area to plant your thyme.
Purchase thyme plants from a nursery. Thyme is particularly tough to start growing in your garden. The temperature has to stay above seventy and there should be significant moisture in the soil for it to germinate. By buying a plant that has begun to grow, you will surpass the initial difficulty of the early growth process. However, if you wish to start from scratch, place twenty or so seeds (which you can purchase at a nursery) in a small pot and cover with fertilized soil. Make sure the seeds are planted at least six inches deep. Keep in a well lit area in your home that stays above seventy degrees.
Dig holes. Now that you've purchased plants, or are ready to transplant your thyme from what you grew inside, dig holes that are 6 inches apart and 4 to 6 inches deep.
Transplant the seedlings. Remove the thyme from its container and plant gently in the soil. Be sure to cover adequately without "choking" the base of the plant with too much dirt build-up. Add some fertilizer to the soil. (Check your planting instructions as certain kinds of thyme require slightly different fertilizers.)
Water regularly. If you live in an arid climate, be sure to water your thyme regularly, 2 to 3 times a week. If you live in a damp climate and it rains often, you may only need to do it once a week.