An ideal range for humidity whilst in veg state should be around 60 - 65%. That can be very tough to accomplish if you have good circulation with air and are extracting the air from the room.

But I don't believe you can harm these plants with a dryer climate.

The real factor to watch is in flower where you want to keep the humidity at or below 25 - 30%.

And thats easy to do if your ventilation is swift, strong and efficient.

Good luck.
HARDDON Reviewed by HARDDON on . Humidity hi everyone i am a first time grower and this is my virgin post of these boards. two questions. 1. what is ideal humidity.. i have a running humidifier now and the plants seem fine. 2. all the fan leaves sprouted so far have only three points? whats up with that... i look at everyone elses pics and there fan leaves have 5/7 points? Rating: 5