Phlox stolonifera aka Creeping Phlox

Phlox stolonifera, or creeping phlox, belongs to the phlox family, Polemoniaceae. This perennial grows wild in the eastern United States. Its main range follows the Appalachian Mountains. It grows in woods, along streams, and on shaded, rocky slopes. Gardeners grow it as a low ground cover. Its leaves stay green through all or part of winter.

Plants reach about 0.5–1 foot [0.15–0.3 metres] tall in gardens. They spread about 0.75–1.5 feet [0.23–0.46 metres] wide. The RHS gives broader upper limits of 1.6 feet [0.5 metres] for both. Creeping stems root where their nodes touch the ground. These stolons spread fast and can form much wider colonies. The low leaf mat stands about 0.25 feet [0.08 metres] high. Green leaves grow in opposite pairs along the stems. They have oval to oblong shapes. Leaves on upright flower stems are smaller than those below.

Loose flower clusters rise above the mat on leafy stems. Each fragrant flower has a tube and five rounded lobes. Lavender and pink shades feature in the species descriptions. Sources place flowering in spring and summer, though their timing differs. The flowers draw butterflies and hummingbirds. Dry seed capsules split open when ripe. Plants can also seed themselves where growing conditions suit them.

Grow this phlox in rich soil that drains well. It prefers steady moisture and slightly acid soil. It also tolerates neutral and alkaline soils. Full sun and part shade both suit it. Keep new plants moist through their first year. Established plants can withstand drought, but moist soil supports growth. Sources give USDA zones 4–8 and 5–9; the RHS rates it H6. Use it beneath shrubs, beside paths, or among spring bulbs. It also suits rock gardens and woodland beds. Planting it on slopes can help hold soil. It tolerates light foot traffic.

Care needs are low, but pests and disease can occur. Powdery mildew may develop during humid weather. Good airflow and removing spent flowers can help limit it. Spider mites may cause trouble in hot, dry sites. Slugs can become pests where soil stays wet. Other reported problems include grey mould, leafy gall, and eelworms. Divide plants in spring or autumn to raise more. Plants For A Future records no known food or medicinal uses. It lists no known hazards, but this does not establish safety for eating.