Citrus Temperature Stress on indoor citrus
What's Happening
Citrus trees are subtropical plants vulnerable to both cold damage and heat stress. Temperatures below 32°F cause cellular ice formation and tissue death, while temperatures above 90°F with low humidity cause leaf scorch, flower drop, and fruit sunburn. Indoor citrus face temperature swings from heating systems, air conditioning, and window drafts that exceed their tolerance range.
How to Fix It
- 1
Maintain 55-85°F range; avoid temperature swings >20°F daily
- 2
Move away from heating vents and air conditioning drafts
- 3
During cold snaps, add insulation or move to interior rooms
- 4
In heat waves, increase humidity and provide shade during hottest hours
- 5
Monitor leaf temperature; if leaves feel hot to touch, increase air circulation
How to Prevent It
Position trees away from windows during winter nights; avoid south-facing glass in hot climates; use thermal curtains to moderate temperature swings