Understanding Temperature for Houseplants
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Having their origin in the tropical regions of the world, majority of houseplants require a fairly constant warm temperature during the growing season and a slightly lower temperature during the dormancy (resting) period.
Nearly all houseplants will flourish if the day temperature is within 10-250C range and a 5-100C drop in night temperature. If the temperature is not right, growth may suffer and the plant may even die.
Majority of houseplants are highly tolerant and will survive temperatures slightly above or below their preferred range for short periods of time.
It is important to note that, a temperature drop of night temperature of more than 150C, may be fatal or damaging to your plants. However, this exception applies to Desert Cacti and Succulents as in their desert habitat they are well adapted to hot days and cold nights.
It is necessary to maintain the right temperature range for your plants and to protect them from sources of drafts like AC units, hot air vents, windy windowsills, open doors, hot stoves and others to prevent sudden temperature changes.
Signs of wrong temperature for your houseplant
For optimum growth of your plants, it is necessary to maintain the ideal temperature. If the temperature is not right, your plants will exhibit the following signs.
- Leaf curl, followed by browning and leaf fall is an indication of too cold temperature.
- Lower leaves wilt, edges turn brown and the bottom leaves fall is caused by too warm temperature.
- If the flowers are short-lived, the temperature is too warm.
- Spindly growth under good light is an indication of too warm temperature.
- Leaves rapidly turn yellow and eventually fall indicates that there is a sudden pronounced temperature change.
General Rule for Temperature for Houseplants
Houseplants need a fairly constant and moderate temperature during the growing season and a lower temperature during the resting season (cold season).
Note: There are many exceptions to this rule. Look up the requirements of your plant in this Houseplants A-Z Guide.
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