Hi... you're so genius! I never think about that !! You can repair the soil, which is the first step when planting this thyme between paving blocks. Start by gently removing any weeds and removing them as close to the root as possible. Then, place your little thyme plant in a small pot, leaving about six inches between each plant. Gently bury the roots, ensuring they're well-covered, and use your fingers to compact the soil gently. To help keep the soil moist, you can mix the planting medium with sand.