Rhipsalis teres, often called pencil mistletoe cactus or spaghetti cactus, is a distinctive epiphytic succulent valued for its long, slender, cylindrical stems that form a dense, trailing cascade. This Rhipsalis species features bright green, branching stems and produces small, white or yellowish waxy flowers along their length, followed by tiny, translucent berries. Its unusual texture and cascading growth make it a popular choice for hanging baskets and elevated displays, bringing a touch of tropical rainforest character to indoor spaces in the UK. It is a member of the Cactaceae family.
The genus name Rhipsalis comes from the Greek word rhips, meaning "wickerwork," referring to the intricate appearance of its stems. Teres means "rounded" or "cylindrical," describing the shape of its stems.
Light: Rhipsalis teres thrives in bright, indirect light. While it can tolerate some lower light conditions, it will produce more flowers and exhibit stronger growth in brighter situations. Direct sunlight can harm the stems. A spot a few feet away from a bright window in a UK home is often suitable.
Water: Water moderately, allowing the potting mix to dry out somewhat between waterings. During the active growing season (spring and summer), water more frequently, ensuring the mix is consistently moist but never saturated. Reduce watering significantly in autumn and winter when the plant is less active. Too much water can lead to root problems.
Soil: A well-draining, airy potting mix is essential. A specialist epiphytic cactus mix or a blend of general potting soil with ample perlite, orchid bark, and a small amount of sphagnum moss is ideal. This type of mix will help prevent water accumulation, which is crucial, especially in the often damp UK climate.
Fertilising: Feed with a diluted balanced liquid fertiliser every three to four weeks during the growing season (spring and summer). A fertiliser formulated for cacti or houseplants is suitable. Reduce or stop fertilising during the cooler, dormant months.
Temperature: This Rhipsalis prefers warm temperatures, ideally between 18-27°C (64-80°F) during the growing season. It should be protected from cold drafts and temperatures below 10°C (50°F), which can occur in UK homes during winter.
Humidity: Rhipsalis teres appreciates moderate to higher humidity levels, characteristic of its native rainforest habitat. While it can adapt to average indoor humidity in the UK, occasional misting or placing the plant on a pebble tray with water can be beneficial, particularly in drier indoor environments with central heating.
Growth Habit: It has a pendulous or trailing growth habit, with long, slender, cylindrical stems that can cascade beautifully from containers. It is an epiphytic cactus, meaning it naturally grows on other plants in its environment.
Toxicity: Rhipsalis teres is generally considered non-toxic to humans and pets. However, it is always a good practice to prevent ingestion.