Setcresia Purpurea (Purple Heart)
‘Purple Heart’ is a trailing, tender perennial with purple stems and violet-purple leaves that produces pink flowers in summer. This plant is mainly grown for its foliage (leaves can reach 7 inches in length); best color is achieved in bright sunlight and a dry, cramped root zone. It is excellent as a groundcover or in containers or hanging baskets. It grows 8-12 inches tall and 16 inches wide.
Height: Stems grow upright, then eventually trail over the side of the pot, up to 2 ft (60 cm) long.
Light: Bright light is needed to maintain the dark purple color. Some direct sun is fine, but keep your plant shaded from strong summer sun. Long spaces between leaves indicate Tradescantia pallida needs more sunlight.
Water: Water thoroughly, then allow the top 1 in (2.5 cm) to dry out between waterings. Water less in winter when growth is slower. Limp, wilted stems may be a sign of root rot; cut off entire stem at the soil level.
Humidity: Average room (around 40% relative humidity). Brown leaf tips are a symptom of dry air. Check out these easy ways to add humidity around your houseplants.
Temperature: Average to warm room temperatures (65-80°F/18-27°C) suit this plant year-round. Purple heart tolerates varying temperatures with a minimum of 50°F/10°C in winter. Keep out of drafts from doorways and away from heat/AC vents.
Soil: Peat moss-based potting mix, such as African violet potting mix is ideal.
Fertilizer: Feed monthly in spring and summer with a balanced (such as 10-10-10 NPK) water-soluble fertilizer.
Propagation: Take 4 in (10 cm) stem tip cuttings in spring or early summer. They'll root easily in moist potting mix.