The Aeonium arboreum ‘Zwartkop’, commonly known as the Black Rose Succulent, is admired for its dark, almost black, foliage. When its unique coloration fades to green, it’s a common concern. Understanding the factors influencing its hue helps restore its appearance.
Understanding the Black Rose Succulent’s Natural Color
The Black Rose Succulent’s dark color comes from pigments called anthocyanins. These compounds are produced by the plant as a defense against intense sunlight. When exposed to strong light, the plant increases anthocyanin production, resulting in its deep purple-black shade. This process, known as “sun stress,” signifies the plant’s response to higher light levels. More intense sun exposure typically leads to darker, more vibrant color.
Reasons Your Black Rose Succulent Is Turning Green
The main reason a Black Rose Succulent turns green is insufficient light exposure. Without enough bright sunlight, the plant produces fewer protective anthocyanins. The underlying green chlorophyll, essential for photosynthesis, then becomes more prominent, highlighting the plant’s natural green color.
Other factors also contribute to color fading. Overwatering, for instance, can lead to a greener appearance as the plant isn’t experiencing the mild drought stress that encourages darker hues. Excessive fertilization promotes lush, green growth, also reducing anthocyanin production. Dormancy, typical for Aeoniums during hot summer months, can also cause a temporary color change as growth slows.
Restoring the Dark Color
To help your Black Rose Succulent regain its deep, dark color, gradually increase its exposure to bright light. Begin by placing the plant in a location where it receives bright, indirect light for a few days. Over one to two weeks, slowly move it to a spot with more direct sunlight, such as a south-facing window indoors or a partially shaded outdoor area that transitions to full sun. This gradual acclimatization prevents sunburn, which can damage the leaves.
Adjusting watering practices is also beneficial. Allow the soil to dry out completely between waterings to encourage mild stress. Water thoroughly until water drains from the bottom of the pot, then wait until the soil is dry again before the next watering. Avoid fertilizing during this restoration period, as it can promote green growth rather than the desired darker pigmentation.
Maintaining the Vibrant Black Hue
Consistent bright light is essential for maintaining the Black Rose Succulent’s vibrant black color. Aim for at least six hours of direct sunlight daily, achievable outdoors in suitable climates or indoors near a sunny window. Grow lights are an effective solution for indoor plants, especially during darker winter months when natural light is scarce. Periodically rotating the plant ensures all sides receive equal light exposure, promoting uniform coloration.
Proper watering habits are also important; continue to use the “soak and dry” method, allowing the soil to become completely dry before rewatering. Aeonium arboreum ‘Zwartkop’ is typically summer dormant, slowing growth and requiring less water during hot periods. Adapting to its dormancy cycle helps prevent overwatering and supports its natural color development.