Kalanchoe plants are cherished houseplants, known for their fleshy leaves and vibrant flowers. Many enthusiasts notice roots emerging from the stems above the soil line, known as aerial roots. Understanding why these roots form can guide appropriate care.
Understanding Kalanchoe Aerial Roots and Their Causes
Aerial roots on Kalanchoe plants are adventitious roots that develop from the stem tissue, not the primary root system. These roots typically emerge as small, white or pinkish nubs that elongate over time. Their formation is often a natural adaptive response, allowing the plant to absorb moisture from the air or seek additional support.
Environmental conditions play a significant role in encouraging their development. High ambient humidity, for instance, can prompt Kalanchoes to produce aerial roots, efficiently absorbing atmospheric moisture. Similarly, if a Kalanchoe plant becomes leggy and top-heavy, aerial roots can form along the elongated stems, seeking to anchor the plant and provide stability.
Sometimes, aerial roots can signal the plant’s response to less ideal growing conditions. Root-bound situations, where the root system has filled its container, can lead to aerial root formation as the plant seeks new space and resources. Consistent underwatering or nutrient deficiencies in the soil may also cause the plant to produce aerial roots, as it attempts to find alternative sources of water or minerals.
Are Kalanchoe Aerial Roots a Concern
The presence of aerial roots on a Kalanchoe is often a normal part of its growth and not a sign of distress. If the plant appears healthy, with firm, vibrant leaves and consistent new growth, these roots are likely a harmless adaptation to its environment.
However, an abundance of aerial roots accompanied by other symptoms can indicate an underlying issue. Observing signs such as wilting or drooping leaves, stunted growth, or discoloration like yellowing or browning of foliage alongside aerial roots suggests investigation. An excessive proliferation of aerial roots without any clear environmental cause might also indicate the plant is struggling to access sufficient resources from its primary root system.
What to Do About Kalanchoe Aerial Roots
If your Kalanchoe is healthy and vigorous, with no signs of distress, the aerial roots can generally be left undisturbed. They do not harm the plant and can even contribute to its unique appearance. Attempting to force them back into the soil or remove them without addressing any underlying issues is unnecessary.
When aerial roots are accompanied by signs of stress, addressing the root cause is important. If the plant appears root-bound, consider repotting it into a container one to two inches larger in diameter, ensuring good drainage. For plants showing signs of underwatering, establish a consistent watering schedule where the soil is allowed to dry out between waterings but not remain parched.
If low humidity is suspected, increasing the moisture around the plant can be beneficial, such as placing the pot on a pebble tray. For leggy plants, providing more light helps prevent excessive stem elongation, and pruning the elongated stems encourages bushier growth. If the aerial roots are purely an aesthetic concern, they can be safely pruned close to the stem using clean, sharp scissors without harming the plant.