Your plants will be happier with higher humidity 40 - 60 percent during veg and 30 - 40 during flower. With lower humidity they will expire more moisture and therefore require more frequent watering. I'm guessing that this will have some impact on the performance of the plant but how much is hard to say. Try putting a 5 gallon bucket of water in the corner. If your light can hit the water even better. You don't need much to raise the humidity. A very small humidifier will do the trick. You should be able to find one used for next to nothing.

Quote Originally Posted by steezyd
So my temp is spot on (73-77) day(67-71) night...but i need a humidifier but cant afford one....my humidity had been in the teens and 20's the past couple of days....and before that was still kind of low in 30's-low 40's...will this affect the quality? or the yield? or both?