The Do's and Don'ts of Greenhouse Temperature and Humidity Management

Riya Chhabda

Greenhouses are a gardener's dream, allowing for year-round cultivation and protection from adverse weather conditions. However, managing the temperature and humidity within a greenhouse is crucial for plant health and productivity.

Here's a comprehensive guide on the do's and don'ts of greenhouse temperature and humidity management.


  1. Monitor Regularly:

    • Do invest in a good quality thermometer and hygrometer to keep track of temperature and humidity levels. Some modern devices even offer remote monitoring and alerts.
  2. Ventilation is Key:

    • Do ensure that your greenhouse has adequate ventilation. This can be achieved through manual or automatic roof vents, louvre vents, or side vents. Proper ventilation helps in regulating temperature and reducing excessive humidity.
  3. Use Shade Cloths:

    • Do use shade cloths during the hotter months to protect plants from excessive sunlight and heat. They can significantly reduce the temperature inside the greenhouse.
  4. Watering Schedule:

    • Do water your plants early in the morning or late in the evening when temperatures are cooler.
    • This reduces the chances of rapid evaporation which can increase humidity levels.
  5. Invest in a Heating System:

    • Do consider a heating system for colder months.
    • Whether it's electric, gas, or solar-powered, a heater can help maintain optimal temperatures.
  6. Humidity Control:

    • Do use a humidifier or dehumidifier as needed.
    • While plants release moisture into the air (transpiration), sometimes additional moisture might be needed, or excess moisture might need to be removed.
  7. Regular Maintenance:

    • Do clean and maintain your greenhouse regularly.
    • Remove any algae or mold growth, as these can affect temperature and humidity levels.


  1. Avoid Overcrowding:

    • Don't cram too many plants into your greenhouse.
    • Overcrowding can restrict airflow and lead to increased humidity and temperature.
  2. Not All Plants are the Same:

    • Don't assume that all plants have the same temperature and humidity needs.
    • Research each plant's specific requirements and try grouping similar plants together.
  3. Avoid Overwatering:

    • Don't overwater your plants.
    • Excess water can lead to high humidity levels, which can in turn lead to mold and fungal diseases.
  4. Beware of Direct Heaters:

    • Don't place heaters directly next to plants.
    • This can cause them to dry out or even burn. Ensure even heat distribution.
  5. Don't Neglect Insulation:

    • Don't forget about insulation. Using bubble wrap or other insulating materials can help maintain temperature, especially during colder months.
  6. Avoid Sudden Changes:

    • Don't make rapid changes to temperature or humidity. Plants prefer gradual changes, as sudden shifts can cause stress.
  7. Don't Rely Solely on Technology:

    • Don't rely only on automated systems. While they can be incredibly helpful, it's essential to manually check the greenhouse conditions regularly.

In conclusion, managing temperature and humidity in a greenhouse is a delicate balance that requires attention and care.

By following these do's and don'ts, you can ensure a thriving environment for your plants year-round. Happy gardening!

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