What is heat index for plants?

Combined temperature and humidity that increases plant stress, wilting, and disease risk beyond air temp alone.

Provide shade, deep water early, mulch, and avoid pruning during heat waves.

Heat Index Plant Stress Checker Calculator

Assess the risk of heat stress for your plants based on air temperature and relative humidity.

Assess the risk of heat stress for your plants based on air temperature and relative humidity.

Air Temperature (°F)

Relative Humidity (%)

The full supporting guide for this calculator is still being expanded. The tool remains accessible while we improve the educational content.

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