Rhipsalis horrida, native to South America, is an epiphytic, or tree-dwelling cactus. Long, densely spined stems resemble "Mouse Tails". Bright, filtered light with ample airflow. Water thoroughly when soil is dry to the touch. Soil should contain more humus. Requires a more tropical atmosphere than desert cacti, including higher humidity and warmer winter temperatures Water thoroughly when soil is dry on surface, but should not be allowed to dry out completely. Prefers nighttime temperatures no cooler than 50 degrees Fahrenheit, especially in winter.
Rhipsalis does not thrive in direct sunlight. Exposure to afternoon sun can burn the leaves, turn them yellow, or lead to spotting. However, without sufficient sunlight, They will not bloom, and its growth can be stunted. Rhipsalis does best with morning sun and full shade in the afternoon. As Rhipsalis is commonly grown indoors, care must be given to the placement of the plants. They should be kept at least 20 inches (50 cm) away from windows that receive midday or afternoon sun. The glass in the windows can multiply the heat from the sun’s rays, causing sunburned leaves. Keep in mind that in its native environment, Rhipsalis is accustomed to receiving light that has been filtered through dense, overhanging tree branches. Picturing this environment can help you adjust your lighting accordingly. Rhipsalis is not a drought-resistant plant, so regular watering is essential. Over-watering, however, can cause weak stems and rotted roots. Using a watering can may help you measure the amount of water you are providing. The size of the pot compared to the size of the plant, the humidity levels in the home, and the type of potting soil used can all affect the watering frequency. Rhipsalis seldom needs to be watered more than once a week. Check before watering by pressing your finger into the soil to a depth of half an inch. Postpone watering if the soil is moist. You can also use a moisture meter to help you determine whether it is time to water. Novices to the world of jungle cacti might prefer purchasing a potting soil made specifically for cacti. Gardeners with experience growing succulents can make their own by combining regular potting soil with sphagnum, coir, orchid bark, or gravel to ensure proper drainage. Most types of Rhipsalis will need to be transplanted every two or three years using fresh potting soil. When repotting, take care not to damage the roots. Do not feed newly repotted or just-purchased Rhipsalis for 12 months. Rhipsalis does not need feeding until the soil begins to become depleted of nutrients. If feeding is desired, use a diluted, half-strength fertilizer formulated for cacti. Feed monthly only during spring and summer months. Follow the directions provided with the fertilizer to determine the correct quantity, which will be based on plant size, pot size, and other factors.