Creeping Thyme 'Mother-of-Thyme' (Thymus Serpyllum) - Zone 4-9 Part Shade-Full Sun 3" Height 36" Spread. Perennial evergreen creeping groundcover with lemon-scented, dark green, edible leaves smothered in clusters of pink-purple flowers early-mid Summer. Plant around stepping stones, cascading over edge of walls. Tolerates foot traffic. Drought tolerant. Average to dry, well-drained soil. Avoid very cold or wet areas. Deer resistant. Attracts butterflies. Propagate by division or cuttings.