Some low-growing border plants are creeping Jenny, hens and chicks, dymondia and wooly thyme. A few others are mondo grass, sweet alyssum, ageratum, marigold and coleus.
Creeping Jenny is an evergreen that typically grows to less than 6 inches tall. Hens and chicks is a drought-tolerant succulent plant that grows very close to the ground and proliferates quickly. Dymondia is a silver-leafed ground cover plant that can withstand foot and pet traffic. Wooly thyme is an ornamental variety that has a fuzzy appearance. Wooly thyme creeps onto the walkway unless it is trimmed back regularly.
Mondo grass is evergreen and grows in thick, spiky clumps that do not require pruning. Sweet alyssum is a delicate-looking flowering plant that creeps to fill in empty spaces. Ageratum produces attractive blue flowers and grows to between 6 inches and 12 inches tall, depending on the variety. Common marigolds usually stay under 6 inches tall and can help to repel pests. Coleus features brightly colored leaves and is easy to care for.