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- #21
Very First Grow!
- Thread starter MadBeans
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JokerJohn
New Member
alright well ill post this temperature guide should help you out when you can get your readers
Weed Farmer - How to Grow Cannabis?
TEMPERATURE - Cannabis Growing Guide
Proper temperature is one highly variable factor. Most books state optimum grow temperature to be 70-80 degrees, but many list extenuating circumstances that allow temperatures to go higher. Assuming genetics is not a factor, plants seem to be able to absorb more light at higher temps, perhaps up to 90 degrees. High light and CO2 levels could make this go as high as 95 degrees for increased growth speed.* An optimum of 95 degrees is new data that assumes very-high light, CO2 enrichment of 1500 ppm and good regular venting to keep humidity down. It is not clear if these temperature will reduce potency in flowers. It may be a good idea to reduce temperatures once flowering has started, to preserve potency, even if it does reduce growth speed. But higher temperatures will make plants grow vegetatively much faster, by exciting the plants metabolism, assuming the required levels of CO2 and light are available, and humidity is not allowed to get too high.
With normal levels of CO2, in a well vented space, 90 degrees would seem to be the absolute max, while 85 may be closer to optimum, even with a great deal of light available. Do not let the room temperature get over 35 C (95 F) as this hurts growth. Optimal temperature is 27-30 C (80-86 F) if you have strong light with no CO2 enrichment. Less than 21 C (70 F) is too cold for good growth.
Low temperatures at night are OK down to about 60 degrees outdoors, then start to effect the growth in a big way. Mid 50s will cause mild shock and 40s will kill your plants with repeated exposure. Keep your plants warm, especially the roots. Elevate pots if you think the ground is sucking the heat out of the roots. This is an issue if you have a slab or other type of cold floor.
As temperature goes up, so does the ability of the air to hold water, thus reducing humidity, so a higher average temperature should reduce risk of fungus.
Contrary to many reports, high humidity is not good for plants except during germination and rooting. Lower humidity levels help the plant transpire CO2 and reduce risk of molds during flowering.
Studies indicate the potency of buds goes down as the temperature goes up, so it is important to see that the plants do not get too hot during flowering cycles.
Weed Farmer - How to Grow Cannabis?
TEMPERATURE - Cannabis Growing Guide
Proper temperature is one highly variable factor. Most books state optimum grow temperature to be 70-80 degrees, but many list extenuating circumstances that allow temperatures to go higher. Assuming genetics is not a factor, plants seem to be able to absorb more light at higher temps, perhaps up to 90 degrees. High light and CO2 levels could make this go as high as 95 degrees for increased growth speed.* An optimum of 95 degrees is new data that assumes very-high light, CO2 enrichment of 1500 ppm and good regular venting to keep humidity down. It is not clear if these temperature will reduce potency in flowers. It may be a good idea to reduce temperatures once flowering has started, to preserve potency, even if it does reduce growth speed. But higher temperatures will make plants grow vegetatively much faster, by exciting the plants metabolism, assuming the required levels of CO2 and light are available, and humidity is not allowed to get too high.
With normal levels of CO2, in a well vented space, 90 degrees would seem to be the absolute max, while 85 may be closer to optimum, even with a great deal of light available. Do not let the room temperature get over 35 C (95 F) as this hurts growth. Optimal temperature is 27-30 C (80-86 F) if you have strong light with no CO2 enrichment. Less than 21 C (70 F) is too cold for good growth.
Low temperatures at night are OK down to about 60 degrees outdoors, then start to effect the growth in a big way. Mid 50s will cause mild shock and 40s will kill your plants with repeated exposure. Keep your plants warm, especially the roots. Elevate pots if you think the ground is sucking the heat out of the roots. This is an issue if you have a slab or other type of cold floor.
As temperature goes up, so does the ability of the air to hold water, thus reducing humidity, so a higher average temperature should reduce risk of fungus.
Contrary to many reports, high humidity is not good for plants except during germination and rooting. Lower humidity levels help the plant transpire CO2 and reduce risk of molds during flowering.
Studies indicate the potency of buds goes down as the temperature goes up, so it is important to see that the plants do not get too hot during flowering cycles.
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- #23
JokerJohn
New Member
no problem just make sure once you pick a light cycle you stick to it, you should be ok cause atm because there pretty young if you change it. but later on down the lines will cause stress and might even hermie your plants
JokerJohn
New Member
also move you lights as close as you can that will help with heating them and also get good growth. a good way to measure if a light is too close to your plant is to put your hand above your plant for 30seconds.. if its too hot for your hand its too hot for your plant
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- #26
JokerJohn
New Member
no problem man.. im baked as hell. just had to repot and newly LST 10 plants, been smoking bongs in between.. wasnt a good idea. what became a 3 hour job turned into 6 hours at snail pace 
JokerJohn
New Member
And im only HALF WAY!
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- #29
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- #30
OG1969
Well-Known Member
So what is the deal with most of Cali's outdoor grow , I had temps over a 100 for more than 30 days and they grew fine, clones were put in the ground and in pots when it was 108 out? I know know not optimal but they did just fine alot of watering, just curious is all. Peace OG
JokerJohn
New Member
JokerJohn
New Member
I didnt stay they wouldnt grow fine
it just says that if you want optimum results. im sure if you could control you temps outdoors you would choose not to have it at 108?.. and IMO i would think that since there talking about controlling temperatures there talking about indoor growing?
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- #34
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