What's the con to low humidity?

On my 2nd grow, and my humidity never has been above 40. Currently at 25. Everything seems OK, for the most part. What issues can I be missing, or possibly run into in the future?

"With very low humidity, the plant is drawing water from the soil at a very high rate, and if the humidity is too low, the plant is unable to draw water at a rate equal to loss through the stomatal openings. The result is that the plants close their stomata, which slows the photosynthetic process (due to carbon limitations) and leads to stress, slow growth and compromised yield. Under severely low humidity, the plant will wilt and die because even its protective mechanisms cannot offset the water stress imposed by the lack of atmospheric water".

On a positive note as your plants get bigger with more leaves the humidity will rise. Lower humidity in flower, especially late flower is a good thing not a bad thing.

You have good airflow and warmth?

Southside112 said:

The result is that the plants close their stomata, which slows the photosynthetic process (due to carbon limitations) and leads to stress, slow growth and compromised yield. Under severely low humidity, the plant will wilt and die because even its protective mechanisms cannot offset the water stress imposed by the lack of atmospheric water".

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Well dam, since you put it like that, I think I need to address this situation.

farmingfisherman said:

You have good airflow and warmth?

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Airflow and warmth are good, yes.

Soul Dwella said:

Well dam, since you put it like that, I think I need to address this situation.

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This is for extremely low humidity like <5% for prolonged periods of time. If your in a tent the humidity will increase as the plants get bigger. 25% is low but not danger low. If it rains where you are humidity will come up even indoors.

Soul Dwella said:

Airflow and warmth are good, yes.

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Plant gets plenty of fresh air?

If you are really worried about it get a humidifier and a dehumidifier and be done with it.

Spray bottle might not hurt either, poor mans humidifier.

farmingfisherman said:

Plant gets plenty of fresh air?

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yes sir. 190 cfm exhaust fan pulling air through the 8in x 6in passive air vent, and the tent still sucks in a bit. 2x2 tent.

I have a hudimifer, its just too small. Needs refilling to often, but I might throw it back in there. Thanks guys. Good info.

None, zero, not a thing.

Soul Dwella said:

yes sir. 190 cfm exhaust fan pulling air through the 8in x 6in passive air vent, and the tent still sucks in a bit. 2x2 tent.

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May need to lower fan speed too if it won’t raise your temperature too much and bring it back up as you have more leaves and the humidity starts to climb

I'm at 20% this time of year...

My 10×10 grow room is consistently 25% RH.

Plants seem happy.

From what I read the Plant will still grow fine you're just not maximizing it's potential. If you're trying to suck ever little gram out of her then you want optimal condition. If you're doing it for fun I wouldn't worry about it.

Have 1 x 5x5 x7, temps- 26-27 steady 24/7- RH 35-65% depending on stage of growth- do have a dehumidifier for flower as it can get to 70-80%, 9 x autos , plants will sort themselfs as they grow, if concerned get a humidifier, if passive air dont bother in view

It may cause to use more phosphorus I read.

BBQtoast said:

None, zero, not a thing.

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Did you even read the posts above you?? What a noob. Go home.

Southside112 said:

Did you even read the posts above you?? What a noob. Go home.

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On second grow never been above 40, what problems could I run into?

None, zero, not a thing.

You got burnt now your trolling, read the others who support this.

Your analysis is the plant dies, no that doesn't happen or low humidity would have sterelized my whole country of plants long ago.

So you get a real answer not a guesstimate like you gave.