Aerial roots on Kalanchoe plants emerge from the stems, or sometimes the leaves, rather than from the soil. These thin, wiry growths are a natural part of the plant’s development. Their presence is not a cause for concern and can offer insights into your plant’s environment and needs.
Why Kalanchoe Develop Aerial Roots
Kalanchoe plants develop aerial roots for several reasons, indicating natural growth patterns and responses to environmental conditions. In their native habitats, Kalanchoes use these roots for stability, anchoring themselves to surfaces or seeking moisture and nutrients from the air. This adaptive behavior can manifest in indoor settings as well.
The formation of aerial roots can also signal specific environmental factors that might be stressing the plant. For example, if the air around your Kalanchoe is particularly dry, the plant may grow aerial roots to absorb more humidity. Insufficient watering can similarly prompt aerial root development, as the plant seeks alternative sources of hydration when the soil is too dry.
Poor air circulation can contribute to a plant’s need for aerial roots. Stagnant air might lead to moisture imbalances, prompting the Kalanchoe to develop these roots in search of better conditions. Low light levels can also be a factor, as plants may become leggy while stretching for more light, and aerial roots can form to provide additional support for elongated stems. Overcrowding in a pot, which can lead to limited soil nutrients and moisture, might also encourage aerial roots as the plant seeks to expand its resource gathering.
Addressing Environmental Factors for Healthy Growth
Adjusting environmental factors promotes overall plant health and can reduce stress-induced aerial roots. Kalanchoe plants thrive in bright, indirect light, ideally receiving at least six to eight hours daily. Placing your plant near a south or west-facing window is suitable, though direct afternoon sun can be too intense and may scorch leaves. If natural light is insufficient, a grow light can supplement their needs, ensuring adequate illumination without stretching.
Proper watering practices are important; Kalanchoes are succulents that store water in their leaves and prefer their soil to dry out between waterings. Overwatering can lead to root rot, while consistent underwatering may trigger aerial root growth as the plant seeks moisture. It is recommended to water every one to two weeks during the growing season, checking that the top inch or two of soil is dry before rewatering.
Kalanchoes are not overly particular about humidity, typically thriving in moderate levels between 40-60%. While extremely low humidity might prompt aerial root growth, excessive humidity can create conditions favorable for fungal issues. Ensuring good air circulation around the plant helps prevent stagnant air.
Repotting every one to two years can prevent overcrowding and ensure the plant has access to sufficient nutrients and space. Use a well-draining soil mix, such as a succulent or cactus blend, and choose a pot with drainage holes to prevent waterlogging.
Managing Existing Aerial Roots
Once aerial roots have formed on your Kalanchoe, it is not necessary to remove them. These roots are not harmful to the plant and can be left alone without detriment to its health. They are a natural part of the Kalanchoe’s growth process and can even add a unique visual element to the plant.
However, if the aerial roots become too long, tangled, or are considered unsightly, pruning them is an option. Use clean, sharp scissors or pruning shears to make precise cuts. Trim the roots close to the stem, taking care not to damage the main plant.
Trimming aerial roots will not prevent them from growing back, especially if the underlying environmental conditions that prompted their formation persist. Regular adjustments to care routines can help manage their regrowth. If the plant is displaying other signs of distress, such as yellowing leaves or stunted growth, addressing those issues is more important than simply removing the aerial roots.
Propagating Kalanchoe Using Aerial Roots
Aerial roots can be a valuable asset for propagating new Kalanchoe plants. Their presence often indicates the plant is ready to form new growth, making propagation an efficient way to expand your collection.
To propagate using aerial roots, select a healthy stem. Use clean, sharp scissors or pruning shears to cut the stem just below a set of leaves. Allow the severed end to dry for a day or two until a callus forms to prevent rot.
Once the cutting has calloused, plant it in a pot filled with well-draining soil, such as a succulent or cactus mix. Lightly water the soil. Place the newly potted cutting in a bright, warm location with indirect sunlight.