i got a small cab.... and i cant seem to keep humidity up... i dont know if its a problem.. but it is my understanding that plants in veg should be around 70% and right now its about 26% it usally hangs around 30's but it can go less or more if lights on or off....also ive tryed water in the grow room.. i currently have 2 cups of water just chilling in there... it seemed to help for a day or two but then it just went back down.... throu the past month or so its been at 15% ( minimum) 69%(max) even thou i think when it read 69 it wasnt in the grow box. temps range between 60's to mid 80's

yeahh sounds like you need to cool it down in there a little try not to let it get above 70 if possible 60 is a good area to try and keep it at.

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There Must be a calm, After storm, there must be calm WHOAAAAAAA after a storm.

I keep the humidity as low as possible, around 30% is good...I dont worry about mold, and the plants transpire better at low humidity...I dont know why you would want it over 40%??? My plants definately love it dry...

He's not asking about his temps JB. Which are fine btw.....60 is FAR to low. What are you talking about man? 25 C/ 77 F is ideal lights on. 60 would be a low lights off temp man.

Anyway....for your humidity problem. Standing water is no good, as you know. Even with a bubbler going in it does not help. I have tried. I had to invest in a humidifier to keep my R/H at 40-45% (flowering). I like having this extra control over my environment. I would recommend you get yourself one too. You can get them in all sorts of sizes for differrent areas, I'm sure you could find one suitable for your grow space. Good luck.

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link to my current grow journal: coco grow - Super Silver Haze, Blue Cheese and Trainwreck

humidity also has its problems, by creating an environment suitable for growing things you do not want....my plants so far have spent their entire time in 25-35% humidity and seem to be doing quite well. I have read similar information, but would have to search for the reference. I talked to fdd about it, and his response was.....his outdoor grows are consistently below 40% for the duration...and I certainly won't be the one to debate his results.....good luck! watch the plant.....it will tell you if things are not to its liking....

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Ride hard, Ride long....git put away Wet each and every time....no holdin' Back.....enjoy the journey ...... cuz that's ALL there is! Walk on and walk tall folks!

"A House Full of Gratitude Has No Place for Fear To Hide"

I'm sure a lot of folks on this site (and elsewhere) would love to have those temp and humidity ranges. How are your plants? i'm betting they are beautiful. if it ain't broke ....

you need your temp. to go up between 90-and 95 degrees if you are using CO2. and be sure your plants are getting more light than usual. also increase the nute dosage.

i hope some of you guys are kidding... i need to lower my temps and raise my humidity.... at the moment my plants are goin yello around the edges of the leaves folowed by some blackening or whitening ... i dont think plants like hot and dry... they like wet and warm
if you have any doubt on that look at rainforests

newsflash....cannabis does NOT grow in the rainforest! I think you would benefit from a little more reading about where cannabis grows naturally....almost anywhere in the world....but certainly not in the rainforest....

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http://www.rollitup.org/grow-journal...strogooey.html

Ride hard, Ride long....git put away Wet each and every time....no holdin' Back.....enjoy the journey ...... cuz that's ALL there is! Walk on and walk tall folks!

"A House Full of Gratitude Has No Place for Fear To Hide"

Not kidding - you can do what you think you have to but i doubt the yellowing is from temps/humidity.

my temps average 74 with the lights on and 65 with the lights off and my humidity rarely gets above 40% (usually around 30%). any plant problems i have are resolved with adjusting pH/nutes and distance to the light.

Unless you are using CO2 injection, high temps slow down growth and high humidity is an invite to mold, pests, and plant disease.