Which of the following is NOT a factor that affects heat in the growing environment?

Humidity is primarily associated with moisture content in the air and does not directly influence temperature or heat in the growing environment like the other factors listed. Latitude refers to the distance from the equator, which affects sunlight exposure and hence temperature patterns. Altitude relates to elevation above sea level and can affect temperature due to the decrease in air pressure and temperatures at higher altitudes. Soil can have thermal properties that influence heat retention and transfer but is more closely related to heat interactions than humidity, which is more about water vapor content rather than temperature regulation. Thus, while humidity can influence overall plant conditions by affecting transpiration and moisture levels, it does not directly impact heat in the way the other factors do.