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Kalanchoe

Kalanchoe blossfeldiana

Identified By Unknown Guest

Kalanchoe is a prominent genus of about 125 species of tropical, succulent flowering plants in the family Crassulaceae, mostly native to the Old World, with a few species originating from the Americas. They are exceptionally popular as indoor houseplants and outdoor garden succulents due to their vibrant, long-lasting flower clusters and thick, fleshy, dark green leaves that store water efficiently. Kalanchoes are well-adapted to dry conditions, requiring minimal watering and thriving in bright, indirect sunlight. Their ability to produce vivid blooms in shades of red, pink, yellow, orange, and white during the shorter days of winter makes them a favorite decorative staple across households worldwide, bringing cheer and enduring color to indoor spaces.

Also known as: Flaming Katy Florist Kalanchoe

Toxicity & Safety

Is Kalanchoe toxic to pets?

Yes, toxic to pets.

Kalanchoe plants contain bufadienolides, which are cardiac glycosides that can be toxic to domestic animals such as cats, dogs, and horses. Ingestion of any part of the plant, especially the flowers, can lead to severe adverse clinical signs including vomiting, excessive drooling, diarrhea, lethargy, and in more serious cases, abnormal heart rhythms or cardiac arrest. Pet owners should keep these plants completely out of reach or avoid bringing them into homes where animals roam freely.

Is Kalanchoe toxic to humans?

Yes, toxic to humans.

Ingesting Kalanchoe leaves or flowers can cause toxic reactions in humans due to the presence of cardiac glycosides. Although generally less commonly ingested by humans in toxic quantities, accidental consumption can lead to gastrointestinal distress, nausea, vomiting, dizziness, and irregular heartbeats. It is strongly advised to keep the plant away from small children and to wash hands thoroughly after handling broken stems or foliage to avoid accidental irritation or ingestion.

Is Kalanchoe safe during pregnancy?

Caution advised during pregnancy.

Due to the presence of potent cardiac glycosides and bioactive compounds within Kalanchoe species, pregnant and breastfeeding individuals should strictly avoid any internal consumption or extensive handling without professional guidance. The toxic compounds can potentially stimulate uterine contractions or negatively impact cardiovascular stability, posing a severe health risk to both the mother and the developing fetus during pregnancy.

Growth & Dimensions

Height 15 - 45 cm
Width 15 - 30 cm
Growth Rate Slow
Care Level Easy
Lifespan Perennial

Ideal Environment

Temperature 10°C - 29°C
Sunlight Hours 4 - 8 hrs/day
Sun Exposure Partial shade
Soil pH 6 - 7.5
Watering Interval 10 - 21 days
Humidity 30.00% - 50.00%
USDA Zone 10 - 12

Tropical and Subtropical Climates

Climate: Thrives in warm, frost-free environments with high ambient light and low relative humidity levels.

Soils: Sandy Soil Loam Cactus Mix
Annual Rainfall: 300 - 1000 mm

Native Regions

Madagascar
Tropical Africa

How to Care for Kalanchoe

How should I handle sunlight?

Provide bright, indirect sunlight for optimal growth and flowering. Avoid harsh direct afternoon sun which can scorch the leaves.

How should I handle soil and fertilizer?

Use a well-draining cactus or succulent potting mix. Feed with a diluted balanced houseplant fertilizer once every month during the spring and summer.

How should I handle watering your kalanchoe?

Kalanchoe is a succulent plant that stores water in its thick leaves, making it highly sensitive to overwatering. Always allow the potting soil to dry out completely completely between watering sessions. When watering, apply water thoroughly until it drains out from the bottom of the pot, but never let the pot sit in standing water to prevent root rot.

How to Propagate Kalanchoe

How to propagate Kalanchoe by cutting?

Propagating Kalanchoe through stem cuttings is a reliable and straightforward method. Select a healthy, non-flowering stem shoot that is at least 7 to 10 centimeters long. Cut the stem cleanly just below a leaf node using a sterilized blade. Allow the cutting to sit in a warm, dry place for a few days so that the cut end forms a protective callus. Once callused, insert the cutting into a well-draining succulent potting mix. Keep the soil lightly moist and place the container in bright, indirect light until new roots and fresh leaf growth successfully establish.

Common Diseases & Pests of Kalanchoe

What is Powdery Mildew and how is it treated?

Fungal
Symptoms:

Powdery mildew appears as white or gray powdery spots or patches on the leaves and stems of the Kalanchoe plant. Over time, affected leaves may curl, yellow, and drop prematurely, severely reducing the aesthetic and overall health of the succulent if left untreated.

Treatment:

Treat powdery mildew immediately by isolating the affected plant and applying a suitable organic fungicide, neem oil, or a potassium bicarbonate spray. Ensure proper air circulation around the plant and remove severely infected leaves to stop the fungal spores from spreading further.

Prevention:

Prevent powdery mildew by placing the Kalanchoe in an area with good air circulation and bright, indirect sunlight. Avoid overhead watering that leaves moisture on the foliage, and maintain appropriate spacing between indoor or outdoor plants to reduce humidity buildup.

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