Kalanchoe, a beloved houseplant, offers vibrant blooms and distinctive succulent foliage, making it a popular choice for indoor gardens. Its thick, fleshy leaves store water, contributing to its resilience. For this plant to truly thrive and display its full flowering potential, understanding its preferred temperature range is important.
Ideal Kalanchoe Temperature Conditions
Kalanchoe plants flourish within a consistent temperature range of 60°F to 85°F (15°C to 29°C). Daytime temperatures around 70°F to 75°F (21°C to 24°C) are optimal for active growth. At night, Kalanchoe tolerates cooler conditions, ideally not dropping below 50°F (10°C) but preferably staying between 55°F and 65°F (13°C to 18°C). This natural day-night fluctuation mimics their native environment and encourages a healthy flowering cycle.
Impact of Temperature Extremes
Temperatures outside the ideal range can stress a Kalanchoe plant, leading to visible distress. Exposure to cold conditions, particularly below 50°F (10°C), can impede growth and cause damage. Leaves may turn brown, black, or become mushy and translucent as water within their cells freezes and expands. Prolonged cold can result in stunted development and leaf drop, making the plant more susceptible to diseases like root rot if the soil remains damp.
Conversely, high temperatures, consistently above 85°F (29°C), also pose risks. The plant may experience increased dehydration due to rapid water evaporation, even if the soil is moist. Signs of heat stress include wilting, browning or yellowing of leaves, and scorched spots that appear bleached or white. Excessive heat can reduce the plant’s ability to flower and may cause leaves to curl or drop as a protective measure, sometimes leading to dormancy.
Managing Kalanchoe Temperature
Maintaining the ideal temperature for your Kalanchoe involves careful placement and seasonal adjustments. Indoors, position the plant in a warm area, away from direct drafts, cold windows, or fluctuating temperatures near heat vents and air conditioning units. A simple room thermometer can help monitor the environment, allowing for timely adjustments.
When seasons change, consider moving your Kalanchoe. If temperatures drop significantly in colder climates, bring outdoor Kalanchoe plants indoors before overnight temperatures fall below 55°F (13°C) or before the first frost. During hot summer months, providing shade can protect the plant from scorching sunlight and excessive heat. When transitioning the plant, gradually acclimate it to new conditions over several days to minimize shock. Kalanchoe prefers low to moderate humidity, and typical household humidity levels are generally suitable.