How cold you let your room get down 2
- Thread starter DrFever
- Start date
redlube
Well-Known Member
Im quite interested in this myself, i live in a very cold climate, like today it is 38C below zero. So when my lights go off, it can get down below 60F i don't want to put heaters in there if i dont have too. I always was told that you dont want more than a 10 degree drop in temps. What do you think?
Kottonmouth king15
Well-Known Member
coldest would be 66. Stays around 70's lights out,but i use a space heater. Do you let it get that cold?
DaveCoulier
Well-Known Member
You shouldn't let your temps drop into the 60's. Lower temperatures will prolong flowering. Having a higher ADT(average daily temperature) will speed up flowering. A large difference in day and night temps will also lead to greater internodal distance. Keeping the difference at 10 degrees or lower would be ideal.
DrFever
New Member
wouldn't genetics be a factor in the temps being lets say plants are from kush mountains daily temps there are in the 80's yet at night there temps tumble below 60 , or other geological areas where plants are from deserts , day time heats are nuts yet night u could freeze to death with that being said
wouldnt temperatures also reduce your potency in your grow room like when u run higher temps the smell is excessive cause the plants are sweating out the THC then when lights out the plant refurbishes the THC lost and also adds a bit more to the flowering plant and so on
One would think that when you switch to flowering you want to induce more colder climate to the plant giving the plant the feeling that its fall time an i better get goin
As fall approaches in your grow room Hypotheticaly speaking and as all falls happen you lose more daylight a few mins every day in Actual so introducing less light in your grow room would be better for instance i am ending week 4 flowering my light cycle is 11 1/2 hrs of light 12 1/2 of darkness by week 6 i will be running 11 hrs of light 13 of darkness till harvest time
Insurance Agent
Member
Daytime conditions should be 70-80 degrees without co2, 80-90 degrees with co2 until the last two weeks when daytime temps should be kept between 70-80 and co2 can be reduced to adjust for the lower metabolism. Night temperatures should be kept above 60 degrees to prevent stress. It is preferrable during flowering to have a night temperature drop of 10-20 degrees to stimulate flowering hormones and reduce stem elongation.
I have a small space heater in my room to maintain 63 degrees F and when lights are on It is around 74 F. Been working just fine for my friends and I for years. Think about it, Does it stay 70F 24 hours outside? NO, you are playing mother nature when growing indoors. Therefore I would do as I mentioned above. Good Luck.
I have a small space heater in my room to maintain 63 degrees F and when lights are on It is around 74 F. Been working just fine for my friends and I for years. Think about it, Does it stay 70F 24 hours outside? NO, you are playing mother nature when growing indoors. Therefore I would do as I mentioned above. Good Luck.
So do you have multiple side by side comparisons to support your claims, or are you in week 4 or some bullshit of flower on your first attempt at this project and just think by visual comparison and your own recollection of a previous grow(s) that these are bigger than previous grows without this cold nighttime thing going on?
I would guess you have no idea really because you claim truth in post #5 and then turn around in post #8 and theorize your findings with questions of possible rather than probable.
How long you been growing? Do you have a degree in plant life or of the like?
Hipshooter.
I would guess you have no idea really because you claim truth in post #5 and then turn around in post #8 and theorize your findings with questions of possible rather than probable.
How long you been growing? Do you have a degree in plant life or of the like?
Hipshooter.
Fatty R Buckle
Active Member
HELLO EVERYONE JUST WONDERING HOW COLD YOU LET YOUR GROW ROOMS GO TO
In Veg i let her get down to 60
and in flower 50 degrees
Holy shit 50....
in veg it's always 78
Flower it's 62
Nullis
Moderator
Cannabis odor results from various substances within the trichomes of the plant other than THC or other cannabinoids. There are two prime categories of aromatic hydrocarbons; terpenes/terpenoids and phenolic compounds. In cannabis there are over a hundred unique terpenoids which are primarily responsible for a plants' aroma, along with a couple dozen phenolic and other compounds that also contribute to it.
Terpenoids and phenols are the precursors to THC, CBD and other cannabinoids. The sun or light plays a huge role in the formation of cannabinoids inside the tricome. UV rays act as a catalyst for the series of complex cascading chemical reactions in which secretions of unique terpenoids and phenols form specific cannabinoids.
Light and excessive heat will degrade cannabinoids to some extent, but the light is really what creates those cannabinoids in the first place. In theory when the lights are off the trichomes are not producing any THC, although it is possible that the plant may use stored energy to synthesize the aforementioned precursor terpenoids and phenols during the dark period.
Indoors temperatures above 86 degrees can lead to stretching plants and airy buds. The stomata, or tiny pores on leaf surfaces which allow air and moisture exchange, will close up. When stomata are closed there is no carbon dioxide entering and thus no or hindered photosynthesis. Increasing carbon dioxide concentration will force the stomata open even with hot temperatures.
DaveCoulier
Well-Known Member
You have that completely wrong. A large night time temperature drop does not reduce inter-nodal elongation. Here is a link that explains DIF.
As for stimulating flowering, that is true with Orchids, but Ive never heard of it mentioned for Marijuana.
Heads Up
Well-Known Member
From everything I've read, it's best to keep your lights off temp as close as possible to your lights on temp. My temps don't vary more than six or seven degrees from lights on to lights off. The big temp swings help to promote stretching in your plant, so if you want tall lanky plants, have a big temp swing. Part of the reason we grow indoors is that we don't have to deal with nature. I'm not trying to replicate nature in my grow room, I'm trying to keep the conditions as stable as possible. I have read this info in a few different books, it's not something being pulled out of thin air.
resinousflowers
Well-Known Member
i agree.in the past when ive grown ,night time temps were alot lower than light on temp and my plants grew normally.but maybe the strain i was growing was able to cope better than others.
i think strain is a very important factor.
Maybe he read this thread about growing MJ by UB.
"Temperature and the importance of day/night differential - In general, a 85/70F (32/16C) day/night temp is best for most hybrids for maximum carbo production. What's really important is a good drop in temperature at night, of at least 15F/4C. If night temps are too high, the plant will use up the carbos manufactured during the day to the process of respiration as opposed to plant cell division/elongation (tissue production)."
SpandySlapper
Member
Spandy the hypocrite strikes again.
DrFever
New Member
well to be honest i am on 10,000 watts hordilux bulbs and one mh bulbs
got flowers showing in 4 days im not into any bs and really dont give a fck
But i am doing a side by side grow running different temps ending week 1 and not one fckin flower showing on other side keeping temps above 60 degrees lights off so really i just posted to see what other people are running for temps may be i was lucky i don't really know but for ending 4 th week thinkin i am doin pretty good
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