Question about humidity

[KIMJONGIL]

Due to the nature of my ventilation system, the humidity levels in the growspace are low during the day, and higher during the night. At day I'm getting 20-30% humidity, and during night I'm getting 60-70% humidity. Is this a problem? Is this harmful to the plants in any way?

[jon420]

Due to the nature of my ventilation system, the humidity levels in the growspace are low during the day, and higher during the night. At day I'm getting 20-30% humidity, and during night I'm getting 60-70% humidity. Is this a problem? Is this harmful to the plants in any way?

What are you using for lights and what is the temperatures during those times?

[KIMJONGIL]

I have a couple 100 watts of CFL's

80-85 degrees during day and around 70 during night

[jon420]

I have a couple 100 watts of CFL's

80-85 degrees during day and around 70 during night

IMO...Your temp is a little high during the day, which could cause the humidity to be so low but without knowing more about the environment around your grow space and what size space you have, it is hard to tell why such a difference from day and night. My temp during the day is 72-74degrees at all times and the humidity is between 35%-45%. At night my temp drops to a steady 60 degrees and the humidity is between 50%-60%. I have no issues with mold or pests and the plants grow great. Let me know a little more about the grow space please:thumbsup:

[TANKJR]

Nothing to worry about there Kim. It's normal for the humidity to go up at night and down during day...while your "day" temps are a little high, as long as they don't get much higher, you should be fine. I would try to keep them lower in flower mode tho...both temps and humidity.