Extremely Low humidity... is this bad?!

[lampost]

OK, so I think I have everything dialed in except humidity. It looks like humidity is pretty constant at around 25% in my room. I know this isn't ideal, but is this going to drastically impact growth rate?? I really don't want to add a humidifier in there so if effects are negligible I'm going to just not worry about it. I understand this low humidity will be good during flower...

lampost Reviewed by lampost on 01-10-2010. Extremely Low humidity... is this bad?! OK, so I think I have everything dialed in except humidity. It looks like humidity is pretty constant at around 25% in my room. I know this isn't ideal, but is this going to drastically impact growth rate?? I really don't want to add a humidifier in there so if effects are negligible I'm going to just not worry about it. I understand this low humidity will be good during flower... Rating: 5

[Rubberbubbler]

your humidity should be between 30-50 % I don't believe it would be the end of the world at 25% but I could be wrong. instead of a humidifier you could use a shallow pan with a little water with a heat mat under it. depending on the size of your room.

[mainegrown]

i found no problem with growing in 20% humidity..
and it will go up when you have more plant mass
giving out H2O thru respiration

~MG a.k.a. le Maine développé

[WashougalWonder]

I get blasted for this all the time, but the ONLY time you really need to worry about low humidity is in clone and seedling stages. As above the transpiration works and it helps the plant 'breathe' to move fluids from the roots to the leaves.

I live where my humidity over a year will be at 90% for a long period and then down in the 20% range for the rest of the year. I make no concessions or attempts to regulate the humidity other than VENTING the room to remove EXCESS moisture to prevent mold and fungus.

Mother Nature does not control the world's humidity well either. The stuff grows wild quite well in arid climates.

[redtails]

25% humidity is about 15% higher than my average humidity and I've never had any problems except with rooting clones without a dome.

[bigtopsfinn]

25% humidity is about 15% higher than my average humidity and I've never had any problems

Same here...

A friend of mine suggested a cheap way to increase humidity, which is to hang up some wet towels if you have room for them. A little arduous, I don't bother. Anyways my humidity is always very low and no problems so far :jointsmile:

[lampost]

This is excellent to hear!! Thanks for the feedback!

I'm not going to sweat it, as mentioned it'll probably climb a bit as they get bigger...

[DreadedHermie]

The size and shape (and number!) of your pots-- and how and when you water-- also influence how much moisture your grow puts back into the air. Those conditions can be maintained or modified by your circulation and ventilation equipment. :weedpoke:

This discussion is really about 'relative' humidity. When your lights come on and the air warms, you move away from the "dew point" and your relative humidity will drops, even with the same total amount of water in your atmosphere--warm air can support more moisture than cold air.

Cold water, OTOH, can support more dissolved oxygen than warmer water. (These separate issues seem to be causing some confusion lately.):rastasmoke:

[mainegrown]

good to know hermie..
always need more info!

~MG a.k.a. le Maine développé