I try to grow at 70-75 degrees F, but usually have to settle for 80-85 ... my plants don't mind too much ... generally, if you are comfortable, they are, too (70-72) ... your humidity is high, though, you should aim for around 40%-45% ... keeps some insect populations down, and prevents molds, mildews ... the plants aspirate better, too ... maybe xcrispi will see your question, and pitch in ... he's using a pretty sophisticated CO2 setup now, and has mentioned how some 'standards' seem to change a bit, when using CO2 ... happy gardening :thumbsup: