Epiphyllum anguliger

The fishbone cactus thrives in environments where it can receive partial sun, about 3-6 hours of sunlight per day, but it can also survive in full shade, with less than 3 hours of sunlight. It's important to observe the movement of sunlight through your garden to select the best spots that offer a balance of light and shade suitable for your plant, ensuring it remains healthy and happy.

Fishbone cactus requires some sunlight filtering down during the day but can also do well in areas with minimal sunlight. If natural sunlight is either too intense or insufficient, it can harm the plant's growth and health. To supplement light, especially in winter or less sunny locations, consider artificial lighting. LEDs are ideal for providing the wavelengths your plants need, with recommended wattages varying based on the type of plants: 30-50W/sq ft for full sun plants, 20-30W/sq ft for partial sun plants, and 10-20W/sq ft for full shade plants. The distance between the plant and the light source should be 12-36 inches, and the duration should mimic natural daylight as closely as possible, which is usually 8-12 hours per day.

Fishbone cactus may display several symptoms due to incorrect lighting. Insufficient light can cause leggy or sparse growth, impacting the plant's structure and making it appear weak. While it may not show explicit abnormalities, insufficient light can also affect flowering and fruiting. Excessive sunlight can lead to chlorosis, where leaves lose their green color, sunscald with damaged plant tissues, leaf curling as a defense against water loss, wilting from rapid water loss, and leaf scorching characterized by brown, dry leaf edges. These symptoms indicate the plant's struggle with its light environment, and adjusting light exposure is crucial for its health.

To optimize your fishbone cactus's exposure to sunlight, gradually shift it to sunnier spots each week to get used to 3-6 hours of direct sunlight daily. If the plant is large or difficult to move, using artificial light can be a good solution. Keep a lamp on for at least 8 hours daily or use professional plant grow lights for adequate light coverage. For outdoor plants, avoid sudden changes in sunlight exposure to prevent sunburn. Gradually moving them to sunnier spots can help. If your garden has obstructions blocking sunlight, consider pruning or transplanting smaller plants to brighter spots. Remember, parts of the plant affected by incorrect lighting might not recover, but new growth should be healthy with improved lighting conditions.

The Fishbone cactus thrives in temperatures ranging from 68 to 100°F (20 to 38°C), favoring a warm and humid environment akin to its native tropical forests in Central and South America. During summer, it's crucial to maintain night temperatures above 60°F (15°C) to prevent plant stress. However, in winter, while it can tolerate lows down to 50°F (10°C), keeping it above 60°F (15°C) encourages growth. The plant enters a dormant state in cooler conditions and requires being moved indoors if temperatures drop below 41°F (5°C), preferably near a south-facing window to ensure adequate sunlight.

In low temperatures, the Fishbone cactus is vulnerable and grows best above 68°F (20°C). During winter, ensure the temperature remains above 41°F (5°C) to avoid stress. If exposed to temperatures below 34°F (1°C), the cactus may weaken, wilt, and become susceptible to root rot. For mild frost damage, trim frostbitten areas, check for root rot (which requires removing the affected roots), and propagate the plant through cuttings if necessary. It should be immediately relocated indoors to a warm spot with sufficient sunlight; use supplemental lighting if natural light is insufficient.

In high temperatures, specifically above 100°F (38°C), the growth of Fishbone cactus halts, and it may experience dehydration, wilting, and an increased risk of sunburn. If temperatures surpass 109°F (43°C), it's important to remove sunburned or rotten parts, provide shade from the harsh afternoon sun until recovery, and temporarily halt watering for any plants with root rot until new roots form. During periods of extreme heat, it's crucial to protect the plant and ensure it has enough water to prevent stress.