The Ric Rac Cactus (Epiphyllum anguliger), also known as the Fishbone Cactus, is a popular houseplant due to its distinctive zig-zag stems. While new growth often appears softer and lighter, persistent skinny growth indicates an underlying issue with the plant’s care. Promptly addressing this ensures the plant’s overall health and aesthetic appeal.
Understanding Healthy Growth
Healthy new growth on a Ric Rac Cactus typically emerges as a lighter green, somewhat pliable stem. These young stems gradually mature, broadening into the characteristic flattened, wavy, or zig-zag segments that give the plant its common name. As they age, these segments become firmer and deepen in color. The robust and full appearance of mature stems signifies a thriving plant.
Causes of Skinny New Growth
Skinny new growth on a Ric Rac Cactus indicates the plant is not developing as it should, often due to several factors.
Insufficient Light
The most common reason for skinny new growth is insufficient light, a condition known as etiolation. Native to Mexican rainforests, the Ric Rac Cactus thrives in bright, indirect light, mimicking its natural dappled sunlight. Low light causes the plant to stretch, producing elongated, thin, pale stems in an attempt to find more light. This etiolated growth lacks the characteristic broad, flattened shape and vibrancy of healthy stems.
Nutrient Deficiencies
Nutrient deficiencies can also lead to weak, skinny new growth. Potting mix can become depleted of vital elements, especially nitrogen, which is crucial for foliage. Without regular fertilization during the growing season or with poor soil quality, new stems may emerge stunted and thin.
Improper Watering
Inconsistent or inadequate watering can stress the plant, hindering robust development. Ric Rac Cacti prefer soil to dry out slightly between waterings. Prolonged dryness impedes nutrient absorption and new tissue formation. Conversely, overwatering causes root rot, impairing nutrient uptake and overall plant vigor, indirectly affecting new growth quality.
Solutions for Skinny Growth
Addressing skinny growth involves adjusting environmental conditions and care practices to promote healthier development.
Optimize Light Exposure
To correct etiolation, gradually move your Ric Rac Cactus to a brighter location. An east or west-facing window is often ideal, providing bright, indirect light without harsh direct sun. If natural light is limited, consider supplementing with a full-spectrum grow light, ensuring the plant receives adequate light hours. Acclimate the plant slowly to increased light to prevent sunburn, which can manifest as brown spots or yellowing on the stems.
Adjust Fertilization
During the active growing season (spring and summer), fertilize your Ric Rac Cactus with a balanced, diluted liquid fertilizer. A 10:10:10 ratio or specialized cactus fertilizer, diluted to half strength and applied every two to four weeks, replenishes depleted nutrients. Repotting into fresh, well-draining soil can also provide a nutrient boost if the potting mix is old.
Refine Watering Practices
Establish a consistent watering routine by allowing the top one to two inches of soil to dry out between waterings before thoroughly soaking the plant. This approach ensures the plant receives adequate moisture while preventing waterlogging. Reduce watering frequency during cooler months when the plant’s growth naturally slows.
Prune Affected Stems
Pruning the skinny, etiolated sections is important for both aesthetics and to encourage the plant to produce healthier growth. Use clean, sharp shears to cut back the elongated stems. New, healthier growth will typically emerge from the nodes or base of the plant once the light conditions are corrected. This practice directs the plant’s energy towards developing compact, characteristic stems.
Preventing Future Skinny Growth
Long-term healthy growth depends on consistent optimal care. Consistent bright, indirect light is paramount, especially during active growth. Regular fertilization during spring and summer ensures access to necessary nutrients, supporting robust stem development. Maintain appropriate watering practices by regularly checking soil moisture, avoiding overly dry or soggy conditions. Maintaining moderate humidity and stable temperatures (60-80°F) can also contribute to the plant’s overall well-being.