Increasing temps into the 90's on purpose?

I've heard of plants being able to survive when the temps are higher but I haven't heard of anyone purposely raising temps for that reason not saying no one does give it a shot

 

Absolutely.

 

TEMPERATUREProper 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 50's will cause mild shock and 40's 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.

• D. Gold: CO2, Temperature and Humidity, 1991 Edited by E. Rosenthal.​

 

Wow good info what's ur sources bro id like to look into this a little deepers I'm really curious about it all now lol

 

A picture is worth a thousand words...

 

LOL What's his source? Ed Rosenthal! The poster gave you his source at the bottom of the article! If Ed says it, you better believe it's true! If you don't know who Ed is, you better get reading! Next to maybe Jorge Cervantes, Ed Rosenthal is arguably one of the foremost authorities on growing weed in the world. Read, read, read!

Great info graphuto! +rep to ya bro!

 

yes i have heard this, i have my own CO2 setup and i have my temps in the upper 80's. my plants seem to love it. i have my exhaust set to turn on whenever the temp in the room gets over 90+. check out my journal if you have any questions

 

I read both and I give the edge to Rosenthal.

 

if you want a bug farm and not a pot farm sure over 88 would def do that, ive been told about 86 degrees will give you more c02 intake, but you better be on top of the mites and watering. im usually sittin 79-81 with c02 no bugs here 6ft ladies 1 week into flowering. hollllla

 

im an indoor closet grow, so no bugs here. i do have to admit though, my plants do drink alot of water at 85+ degrees.

 

what about non-co2 grows?

 

If you have a co2 system in a SEELED OFF room then your temps can reach 85 and its actually recommended by hydroponic stores that it almost that, just nothing above
HOWEVER, if you dont run a co2 system the temps typicaly shouldnt get over 75

The only reason the temps can get higher with co2 is because the co2 affects it in some way that i cannot remmeber right now sorry hahhaa

 

this guys right, i think the higher temps make the plants absorb light more with the CO2 or something like that. idk it something like that, if you have no CO2 there is no reason for the higher temps

 

Actually, thats inacurate information....Co2 is excellent in ALL stages of plant growth...even as a cutting....Most dont use it until flowering though...Nice icy fat buds. But as far as the temps go...If your in that low of a temp STOP USING CO2!!! It's a waste...read up on the proper usage of Co3..a little injection every now and then is cool without all the fancy dancy expensive stuff...but if your temps arent AT LEAST 86*f your wasting CO2. At 86* the Stomato of the plant (which is found on the underside of the leaves...like lungs...kinda) open up more and take in the CO2. if your under this temp its a waste of $$ and effort. Higer temps are handled far better with PROPER co2 usage. To properly use Co2...You need Tanks, regulators, ppm monitors, dehumidifiers, and an A/C unit. THEN its being properly used...without those just use a timer set to the proper mathematical sum that = the square footage of a room....( .0015xsf) should be about right. for instance in a 4x4 room...thats 16sfx.0015*.024. That means set your flowmeter to 2....if you have air leaks in the room then go with 3...Higher temps with co2 is a MUST...dont be fooled by the hype of the 76-78* crowd...thier NOT using co2 correctly...And I usually stop using it at week 6 or 7...dehumidifiers are good too to help keep the humidity the co2 creates down, dont use it at night as photosynthesis only occurs during lights on..
TS Peace

 

Oh Yeah...and Co2 is actually used for pest control as well...crank it up for a while and everything dies...so yeah it's great.

 

good and correct info, didnt know that co2 actually created humidity. thats why rooms humidity has been staying high, +rep