Thyme plants are low-growing woody herbs that thrive in even nutrient-poor soils and on little water. These characteristics make them ideal for use as ground cover plants. When planting a large area with thyme, using plant plugs provides an economical solution for filling the area in as quickly as possible.
Prepare the planting bed by tilling the soil to a depth of at least 8 inches. Amend the soil with compost and aged livestock manure if the soil is of poor quality or lacking organic material.
Dig holes just slightly larger than the root mass of the plugs with a trowel. Place the thyme plugs at intervals of roughly 8 inches, burying the plugs so that the top of the root mass is level with the surrounding soil. Firm the displaced soil around the roots to secure the plug.
Water the thyme plugs and surrounding soil well to settle them in the soil, ensure good root-to-soil contact and collapse any air pockets. Keep the soil moist until the new roots knit in and lightly moist thereafter.