Callisia repens aka Turtle Vine

Callisia repens, or turtle vine, belongs to the spiderwort family. Its native range runs from southeast Texas through tropical America. It grows in shaded, rocky sites, forests, and shrublands. Garden sources describe it as a tender evergreen perennial. Its small, fleshy leaves and trailing stems form dense mats. Gardeners grow it indoors and outside in warm climates.

Plants often stand 0.33–0.5 feet (0.10–0.15 m) tall. RHS gives a taller upper limit of 1.6 feet (0.5 m). Spread reaches about 2–4 feet (0.6–1.2 m). Purple stems branch freely and root where nodes touch soil. Some stems rise above the mat, while others trail. The green leaves are oval, with pointed tips and rounded bases. Their undersides often show purple tones. Fine hairs line the leaf edges. Leaves reach about 0.13 feet (0.04 m) long.

Small flowers appear from late spring into early summer. They grow in clusters where leaves meet the stems. Each flower has three petals, which may be white or pink. The fruit is a small, flattened capsule. It splits open to release brown, wrinkled seeds. The foliage provides most of the plant's value in containers. Trailing stems suit hanging baskets, where they can hang freely. In warm regions, plants also serve as ground cover.

Give turtle vine bright light filtered from strong sun. Harsh direct sun can scorch or discolor its leaves. Too much shade leads to weak, stretched stems. Use soil or potting mix that drains well. Keep it moist during active growth, without leaving roots waterlogged. RHS advises monthly liquid feed during the growing season. This plant cannot withstand frost. RHS recommends outdoor growing only where winter temperatures stay above 50°F (10°C). It lists hardiness as H1B; NC State gives USDA zones 9–11. Stem cuttings and rooted offsets offer ways to make new plants.

Growth is fast, and care needs are low. RHS reports few routine pest or disease problems. Still, watch for spider mites, aphids, and mealybugs. Excess water can lead to root rot and fungal disease. Rabbits may eat the leaves. Dense mats can crowd out weaker plants. NC State lists it as invasive in several countries. Ingestion can harm children and pets, causing stomach upset or throat swelling. Breathing and swallowing may become difficult. Leaf oils and sap can also irritate skin and mouths.