Temperature Stress on anthurium
What's Happening
Anthurium flowering is triggered by stable warm temperatures between 70-85°F (21-29°C). Temperatures below 65°F or above 90°F inhibit the metabolic processes required for inflorescence initiation and development. Cold drafts from air conditioning, winter window placement, or proximity to exterior doors in winter cause temperature stress that suppresses flowering even when light and humidity are adequate. The plant prioritizes survival over reproduction when temperature stress occurs.
How to Fix It
- 1
Temperature assessment: Verify plant is not near AC vents, drafty windows, or cold exterior walls
- 2
Immediate relocation: Move to stable temperature zone away from drafts; target 70-85°F consistently
- 3
Heating solution: Add seedling heat mat under pot set to 75°F during winter months
- 4
Seasonal adjustment: Expect reduced flowering November-February even with supplemental heating
- 5
Monitor with thermometer: Use digital thermometer to verify actual temperature at plant location (not room average)
How to Prevent It
Maintain stable 70-85°F temperatures year-round; avoid positioning near air conditioning vents, drafty windows, or exterior doors; use heating mats under pots during winter if room temperature drops below 65°F; provide consistent temperatures with minimal fluctuation between day and night.