Optimal relative humidity will change according to the temperature in your grow environment. Have you heard of VPD (vapor pressure deficit)? Here is a chart which will break down what the optimal relative humidity is according to your temperature:http://3ncb884ou5e49t9eb3fpeur1-wpengine.netdna-ssl.com/wp-content/uploads/2017/03/vapor_pressure_deficit_relative_humidity_chart_small.jpg Also, here is a video on VPD:https://www.youtube.com/watch?v=k5bb3lazp6A VPD does have it's risks though so if you're a beginner, I don't recommend going by it. Too high of humidity runs you the risk of powdery mildew, bud rot, and mold. To safe side things, I always tell beginners to aim for 40-55% RH in flowering. The final two weeks of flowering many people drop their relative humidity even lower than that.
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Optimal relative humidity will change according to the temperature in your grow environment. Have you heard of VPD (vapor pressure deficit)? Here is a chart which will break down what the optimal relative humidity is according to your temperature: http://3ncb884ou5e49t9eb3fpeur1-wpengine.netdna-ssl.com/wp-content/uploads/2017/03/vapor_pressure_deficit_relative_humidity_chart_small.jpg Also, here is a video on VPD: https://www.youtube.com/watch?v=k5bb3lazp6A VPD does have it's risks though so if you're a beginner, I don't recommend going by it. Too high of humidity runs you the risk of powdery mildew, bud rot, and mold. To safe side things, I always tell beginners to aim for 40-55% RH in flowering. The final two weeks of flowering many people drop their relative humidity even lower than that.