Beat the Heat: How to Protect Plants in Your Greenhouser

Are your greenhouse plants drooping even with good care? If tomatoes, peppers, or cucumbers look stressed despite watering and feeding, the problem may be hidden in plain sight — it's likely the heat. Learn how to stop overheating before it wipes out your harvest.
Ideal Greenhouse Temperature & Humidity
Summer heat inside greenhouses often exceeds what most crops can tolerate. Many popular vegetables suffer when temps rise above 90°F. Maintaining ideal conditions — based on the crop — is crucial to keep growth and pollination on track.
Ways to Cool Down a Greenhouse
Simple steps like improved ventilation, reflective coatings, or even planting vines inside the greenhouse can reduce heat stress. Shade cloth or small fans also help balance airflow and temperature.
How to Raise Humidity Levels
Humidity plays a key role in greenhouse health. Mist systems, watering walkways, or placing water barrels help stabilize levels, but methods must match your crop's preferences to avoid disease.
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