Winter Growing / Humidity & Temp

latewood said:

For veg, you want 65% pr higher. IN bloom 40% is awesome. Running consistently low humidity levels; Do! Effect your plants.

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No, low humidity does not significantly affect Cannabis plants. As dry as 20-30% is fine, it is likely that even drier conditions wont cause problems. In bloom the drier the better. The only thing is your media is going to dry out quicker. Cannabis plants get water from the soil/media they are growing in.

Wow! You must have read different grow books, than I did years ago. If that is what you want to teach, I cannot fight you here. However; I am going to continue to teach agriculturally proven Grow facts. Peace

grow tiger said:

An

I have like three buckets of water in my closet and it barley raised the humidity, last grow ,if I added just a small bowl of water it would higher the humidity

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Are you sure your humidity meter is correct? It sounds odd, that your RH would be sky rocketing one year, and too dry the next. Is this seasonal, or from a different time of year (season), for example? It is always humid where I live; So I am not sure this would change that drastically in your area, but just a thought.

grow tiger said:

An

I have like three buckets of water in my closet and it barley raised the humidity, last grow ,if I added just a small bowl of water it would higher the humidity

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Are the buckets of water under the light? The sun is a keystone in the water cycle.

latewood said:

Wow! You must have read different grow books, than I did years ago. If that is what you want to teach, I cannot fight you here. However; I am going to continue to teach agriculturally proven Grow facts. Peace

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Fuck what some book says when practical experience has demonstrated the objective. Seeds sprout and seedlings grow just about as well at 25% RH as they do at 60% RH. Despite what some old pot growing book might have to say.

The nit picking and inordinate sense of necessity for control is a source of troubles for many. I threw my hygrometer/thermo against a wall months ago and have yet to buy another one, because if there's one thing I don't need a digital readout to tell me it is that the air is fucking dry, and it's freezing outside.

Books all say different things while people flap their yellow wings.

I am sorry that you feel the need to cuss me out. Your argument is found, wanting.

As a moderator; You should be helping, not causing dissent.

I want to apologize to SeaGrow. If you respect my opinion; Just ask. Peace

No no no. You see if I called you, directly, a "fucking retard" or something along those lines, that would be cussing you out.

And there is no argument. What do you want exactly? I'd post a picture of happy seedlings next to a hygrometer that reads "30%"... but as I mentioned I threw the fucking thing against a wall. Then, even if I did post such evidence, what then?

I don't know wth is wrong with kids these days. Use the F word casually all of the sudden you're "cussing them out".

humidity in veg should be in the 60s.. .. in flower.. anything from 30-50 isn't bad.. and under that.. if you your plants are healthy and happy it shouldn't be an issue.. but 20s and lower.. can also affect growth speed and so on..

but.. in reality.. perfect temps and humidity will increase EVERYTHING GOOD.. dialed in environment is half the game..

so don't skimp.. grab heater.. dehumidifier.. humidifiers.. and get your environment right.. and read your plants.. some strains love humidity .. some hate it..

Someone please name me one strain that "loves humidity" in bloom.

latewood said:

Are you sure your humidity meter is correct? It sounds odd, that your RH would be sky rocketing one year, and too dry the next. Is this seasonal, or from a different time of year (season), for example? It is always humid where I live; So I am not sure this would change that drastically in your area, but just a thought.

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Yea its two different seasons , I'm in new York so my last grow to harvest it was summer , real hot n humid n now its winter , I have my rooms temp at 70°f n if I try heating up the closet with an aletric heater it just makes the humidity fly down ..... I put three buckets of water in there n its almost to 45 rh , I just don't know how the different temp n humidity will effect my grow , I guess its a learning thing when u live in a state where one day its 64°f out n the next day its 10°f ..... This will be my first grow during the winter season but I imagine as long as I can control my closets temp n rh I'll b OK...... I have one seedling of sour diesel n it looks amazing for only 14 days old... Just six that out of six seeds only one germinated , I scratched my head since iv never not been able to germinate a seed

^Humidity fluctuates, it can swing up or down often wildly depending on the conditions outside. If it is rainy outside, humidity goes up. I also live on the East Coast, where the weather changes without a moments notice. These people just don't get it, they are too worried about what their books, grow mags and the guy at the hydro shop says, and it is no offense to them they can't help it.

Think about it though, do you think the weather concedes to Cannabis? Nope. It would not have survived if it didn't survive/thrive in the face of some minor environmental stress like the humidity being not quite perfect. Not to mention that these plants are able to regulate the flow of moisture throughout the plant by opening and closing the pores on their leaves (stoma). As they transpire they take up water from the media, which is no problem indoors when you can just give your plants water. I realize some growers may be afraid of water.

The point is, I can assure you and the OP that any RH between 20 and 70 is fine for vegetating your drug plants indoors. If it is drier you're going to be watering more frequently. You could counter this with a more absorbent growing media.

Your primary concerns should be the temperature, your growing media and providing adequate lighting and a clean environment. 70 isn't really too cold to grow in, but that is a bit too cold for germinating seeds. Germination will be slow if anything at cool temperatures, use a seedling heat mat.

grow tiger said:

Yea its two different seasons , I'm in new York so my last grow to harvest it was summer , real hot n humid n now its winter , I have my rooms temp at 70°f n if I try heating up the closet with an aletric heater it just makes the humidity fly down ..... I put three buckets of water in there n its almost to 45 rh , I just don't know how the different temp n humidity will effect my grow , I guess its a learning thing when u live in a state where one day its 64°f out n the next day we got littirally five feet of snow in the street n was stuck in the house for five days ..... This will be my first grow during the winter season but I imagine as long as I can control my closets temp n rh I'll b OK...... I have one seedling of sour diesel n it looks amazing for only 14 days old... Just six that out of six seeds only one germinated , I scratched my head since iv never not been able to germinate a seed

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Sounds like you are getting a handle on the whole idea. I thought that you may be describing 2 different seasons. Good Luck.

BTW. I know where you live due to the 5" of snow comment. My wife is from West Valley...nuff said. Peace

JointOperation said:

humidity in veg should be in the 60s.. .. in flower.. anything from 30-50 isn't bad.. and under that.. if you your plants are healthy and happy it shouldn't be an issue.. but 20s and lower.. can also affect growth speed and so on..

but.. in reality.. perfect temps and humidity will increase EVERYTHING GOOD.. dialed in environment is half the game..

so don't skimp.. grab heater.. dehumidifier.. humidifiers.. and get your environment right.. and read your plants.. some strains love humidity .. some hate it..

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Thank You; Some one who knows what they are talking about.

^Where?

Be sure to use dehumidifiers alongside your humidifiers, kids.

and always research how to ventilate and placement of intakes and exhaust.. placement of fans.. and dehumidifiers and humidifiers need to be placed strategically or you will end up wasting electricity.. and still have issues in flower.

ive noticed great growth in the high 70s early 80s .. honestly heat wise.. with humidity around 40.. in flower.. seems to work really well.. the last 2 weeks.. ill drop the humidity.. and let the night temps drop.. and day temps drop.. and pull my lights up a little .. all this is being done to simulate the end of flower.. seems to work very well for me.. but hey.. there are many ways to achieve a nice product.. and sometimes people get beginers luck.. and then think they did everything fine.. and then they have a few not so great results.. and wonder what to do .. get agrivated and end up quiting and selling equipment to try an regain some of the investment..
but in reality.. a stable environment.. will get you half way to were you need to be..

My flowering room stays at 16% during lights on, around 22% with lights off. I'm a noob so all I can really say is that I hope that's not too low... but I've got some experienced grower friends here in CO who say it shouldn't be a problem...

Se

Colorado Jay said:

My flowering room stays at 16% during lights on, around 22% with lights off. I'm a noob so all I can really say is that I hope that's not too low... but I've got some experienced grower friends here in CO who say it shouldn't be a problem...

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Seems really low to me, I'm no expert but that seems like its really really low, I like 40% maybe 5% lower during flower... N veg I like it at 60% , its winter were I am so my temp is only at 70degrees but it seems to be very healthy ...... And u gotta watch when u harvest with being that low, don't wanna dry to quick , dry slow as u can, I like to hang the whole plant with the fan leaves for at least two three days before I manicure and continue to dry , good luck brother ,happy growin

DemonTrich said:

not enough r/h increases risk of getting PM (powdery mildew).

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I thought having your RH too high increased the risk of getting many forms of fungus? I know in flower, you don't want the same RH you want in veg...if I'm correct, you want it to be lower. And I too feels lower 70's is a good range for flower, but it's all really in respect to what the plant's temps were in veg. For example, my veg average temp was about 76F. So now, in flower, I try to keep it around 72F. If it were 72F in veg, I'd probably try to keep it at 70F in flower. It's just what works the best for me in my situation though, I too am taking on the challenges that come with the winter. Because I am in DWC, I would muuuuch rather deal with winter temps than summer temps!

Unfortunately there's not much I can do to get the humidity higher, I put a humidifier in the room and ran it for days and could only ever get the humidity from 16% up to 17%. If I shut down the ventilation fans then the humidifier will keep it more humid but then it gets way too hot...