Thymus ×citriodorus. Evergreen, perennial herb has lemon-scented, golden leaves that turn chartreuse in the summer. Lavender flowers. Great for rock or herb gardens, edging and groundcover. Grows 4-9" tall by 12" wide. Blooms in late summer. Full sun with light shade in the hottest climates. Plant in light, well-drained soil. Zones 5-9.