Remove all weeds and stones from the area you wish to cover with creeping thyme. Plan the sowing for anytime between May and August.
Mix compost into the garden soil to create a mix of approximately 50 percent compost and 50 percent soil. Work the compost into the soil to a depth of 6 inches.
Mix the creeping thyme seeds with sand to better spread the seeds.
Spread the seeds-and-sand mix over the prepared area.
Water the planted area thoroughly. Continue to water regularly as the seeds germinate.
Thin seedlings to a spacing of 12 inches when they have grown to a movable size.
Plant the removed seedlings in bare areas.
Plan to start creeping thyme indoors in early spring or mid to late autumn when the temperature is around 55 degrees Fahrenheit.
Spread the seeds on the surface of a tray or pot filled with compost. Press the seeds lightly into the soil, but do not cover them.
Place a clear plastic cover over the tray and place the tray where it will be exposed to diffused sunlight.
Allow air into the covered tray gradually as the seeds begin to germinate. Creeping thyme seeds germinate within 15 to 30 days.
Water the seeds lightly on a regular basis.
Plant seedlings in potting soil in 3-inch pots when they are large enough to move safely.
Acclimate the seedlings to the outdoors over the course of 10 to 15 days — beginning after the risk of frost has passed — before planting them.
Plant creeping thyme plants at least 8 inches away from each other; 10 to 12 inches is ideal. This allows room for the young plants to spread.
Use a trowel to dig a hole in the soil 2 inches deeper than the pot containing the creeping thyme.
Mix compost with the soil.
Place the creeping thyme plant into the hole. Make sure the base of the plant is at or just barely below the current ground level.
Fill in the hole with the remaining dirt-and-compost mixture.
Tamp the dirt down around the plant.
Water the plants thoroughly and continue regular watering throughout the first season as the plants establish themselves.