A prefix is a word part added to the  beginning of a word to create a new word with a different  meaning.    Examples: refill, undo,  incomplete, precooked   â¦  (Letters added to the end of a root or word are a suffix.). + 213 others found this useful. Caroline Russell.
Its not uncommon to have above 90% relative humidity readings. I find it uncomfortable once the humidity is over 70%, but I'm really not a 'good' test subject as I have lived in Florida all my life and have gotten use to high humidities. I can tell you one thing with certainity, the insects love the high readings! 60% is a threshold in the summer.
Ventilate the grow room area by allowing the air in. Improper level of humidity and temperature will cause stress on marijuana plants, resulting to stunted growth and poor yield. What level of temperature and humidity should be maintained in the grow room area? 1. About 50% to 60% level of humidity is best until the last two weeks of flowering. 3. Maintain 70 to 80 degrees without CO2 during daytime and 80 to 90 degrees with CO2 until the last 2 weeks of flowering.