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Minimum Temperature Tolerance for African Violets

A gardener asked the lowest temperature African violets can withstand on an outside terrace.

Critical Temperature Thresholds

Ideal range: 65–75°F (18–24°C) for active growth and blooming.
Minimum safe: 60°F (15°C) – below this, growth slows and blooming stops.
Danger zone: Below 55°F (13°C) – risk of permanent damage or death.

Why Temperature Matters

African violets are tropical plants with no dormancy mechanism for cold. Chilling injury disrupts cell membranes, causing leaf yellowing, collapse, and susceptibility to rot. Humidity is equally critical; low humidity exacerbates cold stress.

Outdoor Placement Advice

Do not place African violets outdoors unless temperatures consistently stay above 65°F, even at night. Use a thermometer to monitor. In most climates, they are strictly indoor plants.

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