Humidity during Veg

Hey guys,

I have checked around the internet and on here and have read mixed things about humidity in veg. Some people say to have high humidity in veg and some say low. I am thinking Veg I need like 50% and in flower like 20%.

My questions are

1) Is it correct to think I should have higher humidity in Veg? Right now I am at 20% and want it higher.

2) If I put a humidifier in there will my Bulb pop if some of the moisture hits it? I have a 600 Watt HID going right now and it is exposed.

3) If the bulb could break are there any other ideas other then a humidifier? I have tried the wet towel and bowl of water thing before and neither of them raised the humidity even a single percent.

This is my 4th grow and I have always just kept the humidity at 20% in Veg but as with every grow I want to learn from the past ones and do better which is why I want to see if the higher humidity could help my girls.

thanks for any help guys.

....anybody???

I used a couple of pans of water with airstones in them. The bubbling and popping raised my humidity by 20% with the vent fan running, and 40-50% at night with everything else off. My bulb didn't pop.

You want a container that is low, wide, and long so the water has a lot of surface area in contact with the air. Use an airline splitter for 2 pans. It's way cheaper than buying a humidifier. Which, btw... the cheapest humidifiers use steam to raise the humidity (turn your plants into cooked spinach, lol), and they don't even do as good of a job as diy.

A few questions for you.
How big is your space?
Is it enclosed?
What extraction do you have running?

A friend had a similar problem, he was using 2x 400W lights with all his plants sitting in the middle of a large room. His canopy area meant he had enough light for his plants (3ft x 6ft) but the room was 10ft x 10ft. He also had a 10" 1500cfm fan running, this was perfect for the room but not for his grow, he was sucking all the moisture out of the room. Of course, this meant his humidity was very low.
We partitioned a space off with white & black plastic sheeting (like a tent). He sold the big fan, got one that gave him 3x air exchanges per min and his humidity went up to 40%. The net cost was zero, just a couple of hours putting up the partition.

humidity during rooting stage and veg should be about 75% , later when the buds form and are more susceptible to bud mold you want it no higher than 45%

woodydude said:

A few questions for you.
How big is your space?
Is it enclosed?
What extraction do you have running?

Click to expand...

I have a tent that measures 51.5 x 22.5 x 48.5 and a 4 inch inline fan going at half speed to vent out and a 4inch duct fan blowing cool air in. My temps are always between 75-78 degrees with lights on and 65-67 with lights off and my humidity is always between 24-27%

Xcon said:

I used a couple of pans of water with airstones in them. The bubbling and popping raised my humidity by 20% with the vent fan running, and 40-50% at night with everything else off. My bulb didn't pop.

You want a container that is low, wide, and long so the water has a lot of surface area in contact with the air. Use an airline splitter for 2 pans. It's way cheaper than buying a humidifier. Which, btw... the cheapest humidifiers use steam to raise the humidity (turn your plants into cooked spinach, lol), and they don't even do as good of a job as diy.

Click to expand...

Thanks Xcon I'll try that. Before I just put a bowl in and nothing happened, but I'll try the airstones.

I don't really worry about it in veg. Just whatever the RH is that's what my veg room is and I haven't had any problems at all. During flower I try and keep it at 50% to 55%.

yeah I would like to keep it at that level too. Mine is at 25

It would be nice if there was an affordable way to regulate our humidity without sealing everything up and using full environment controls, that kind of setup is way out of my budget.

My dry-spell happened during winter, 20% humidity was fucking up my own sinuses but I cared more about my plants LOL, gnomesayin'? I used a desk fan blowing across the surface of the water too, that really helps evaporation.

50-55% all the time.

I would suggest turning off your intake fan, relying on a passive intake and misting your plants on a daily basis just after lights on.
RH is a measure of the ratio between how much moisture is in the air relative to how much the air can hold. Warmer air can hold more moisture than cooler air. So during lights off, the RH will naturally increase anyway. MIsting is a simple way of increasing RH with lights on.

Someone will say "you shouldnt mist under lights because it will burn the plants" To which I will say cough BULLSHIT cough. I have misted for longer than I can remember and have never had a plant turn crispy on me! As long as you dont overdo it and mist within half hour or so of lights on, there wont be a problem, not with the temps you have.
W