C02 and Temp

[med420]

I've read some new rticals on c02 enrichment and tep for maximum growth. All stating that with a ppm of 1500 and temps between 85 and 95 for max growth. Nothing stating about veg and or flowering cycles. Or whether this is room temp or plant tissue temp. Any feed back would be good.
As far as my test trials, room temp at 80 to 85 and plant tissue temps 85 to 90 are producing wicked results compared to my previous lower temps with the same c02 enrichment. Those temps being 75 to 78 degrees F. Med420.

 

[moses224]

i run 87 degrees 1800ppm with excellent results

 

[med420]

NICE, thanx for the feedback! keep it green and growing! med420.

 

[morrisgreenberg]

as a temp issue when i first started, i was forced to use co2 cus i couldnt get below 85, co2 at high concentrations such as 1500ppm is useless at normal temps (72-76F) but 85-90 its a rocket ship, first order of business though would be if your in hydro gonna need a chiller. like i said for those people with temp issues c02 is the answer, without it your grow will slow to a crawl

 

[med420]

Rez is outside, I run drain to waste -hand water. no need for the chill'a

 

[sammyz2646]

as a temp issue when i first started, i was forced to use co2 cus i couldnt get below 85, co2 at high concentrations such as 1500ppm is useless at normal temps (72-76F) but 85-90 its a rocket ship, first order of business though would be if your in hydro gonna need a chiller. like i said for those people with temp issues c02 is the answer, without it your grow will slow to a crawl

Is this true? I have been running 1500ppm C02 with temps around 75. Would it be smart for me to raise the temps to the upper 80's? I will need a chiller as well if I do this. Would this be a smart move?

 

[morrisgreenberg]

yes sammy, im not sure about exact words for plant parts, but basically like me and you when it gets hot we sweat and get over extended, plants do everything we do when they are too hot, more water consumption and such, i think they are called peteoles, these peteoles close at over 85F, with high temps and added co2 the peteoles open and along with the plants other hgih temp functions like faster resperiation, this will speed growth.

 

[Guest]

right on morris, great information however one change, petiole should be change to stomata. Just a vocabulary mixup, but the concept was top notch!

you are spot on about the increased metabolism, great topic.

When a plant has access to an increased metabolism it is advantageous for all other aspects of the environment and grow to be preforming at their best ability. If not it may not be possible to utilize the newly created higher metabolism allowance. They (co2, feed, humidity, temp, ect.) are working in conjunction with each other allowing the increased metabolism, increasing co2 ppm be ready to adjust feed accordingly also.

IMO c02 is the last addition to a already dialed in environment, adding co2 to an inefficient garden could help but will also cloud issues that need to be first sorted. Then again, dialing in is preference also. Happy tuning

hope this helps, also there are very good topics reguarding c02 on icmag. Much other pertinant information in reguards to this topic has already been discussed about how co2 works. Might i suggest to learn the functions of co2 to the plant, and its relationship to environment/feed ect. Then you will have an upper hand at dialing in your strain/garden.

It's all so variable, but that is the fun part! 28-31 Celcius seem to be the sweet spot so far. Me think this is mid to upper 80's in F. Not past 31 C if possible, though some varietys will thrive with higher temps providing adequate airflow is available.

 

[sammyz2646]

Thanks for all the intelligent input guys. It is certainly a pleasure speaking with people on this site who are so kind as to help everyone else with their learned skills. This site is a truly great thing!!! You could read 1000 books and mill over so much unnecessary information. This is an excellent shortcut to SPECIFIC info you seek. Not to mention all of the great photos to see

 

[med420]

The word and part of plant is the stomata. And yes c02 at 75 and below is a complete waste of time and money.

 

[foaf]

And yes c02 at 75 and below is a complete waste of time and money.

why do you say that? it is just not true. there are tons of studies that related co2 to growth rate and discuss temperature. most are not with cannabis however. google co2, plant growth, temperature.

the basic premise is that all chemical reactions proceed faster at higher temperatures, up to the point where some plant regulatory factors set in or some disease or other environmental variable is affected. (obviously more complicated than that - some plants wont grow at high temps at all - but cannabis isnt one such plant - think Columbia/Mexico/Africa -> Hot)

but.... the reaction (photosynthesis) is limited by available reactants in the microenvironment of the chloroplasts, and the limiting nutrient is co2 in both c3 and c4 plants.

so the end result is that you dont get much better growth from raising the temperature if you do not provide adequate co2. it doesnt mean that the inverse is true.

the idea that plants can tolerate higher temps when using co2 is a poorly documented issue that gets repeated over and over and over so it becomes dogma. Tolerate isnt the issue, but risk to benefit is. Risk of root zone issues increases with temperature but without co2 growth doesnt increase significantly.

pot plants can grow just fine at higher temperatures without co2 if you keep the root zone cool, and by the same token, even with co2, if your root zone is hot, you are asking for problems.

 

[morrisgreenberg]

right on morris, great information however one change, petiole should be change to stomata. Just a vocabulary mixup, but the concept was top notch!

you are spot on about the increased metabolism, great topic.

When a plant has access to an increased metabolism it is advantageous for all other aspects of the environment and grow to be preforming at their best ability. If not it may not be possible to utilize the newly created higher metabolism allowance. They (co2, feed, humidity, temp, ect.) are working in conjunction with each other allowing the increased metabolism, increasing co2 ppm be ready to adjust feed accordingly also.

IMO c02 is the last addition to a already dialed in environment, adding co2 to an inefficient garden could help but will also cloud issues that need to be first sorted. Then again, dialing in is preference also. Happy tuning

hope this helps, also there are very good topics reguarding c02 on icmag. Much other pertinant information in reguards to this topic has already been discussed about how co2 works. Might i suggest to learn the functions of co2 to the plant, and its relationship to environment/feed ect. Then you will have an upper hand at dialing in your strain/garden.

It's all so variable, but that is the fun part! 28-31 Celcius seem to be the sweet spot so far. Me think this is mid to upper 80's in F. Not past 31 C if possible, though some varietys will thrive with higher temps providing adequate airflow is available.

yea what he said

 

[noone88]

You guys need to invest in an infrared thermometer. The temperature of the room is only part of the equation.

If you room is approximately 75 degrees, the temperature of your canopy is approximately 5-6 degrees higher. This of course varies with the height of your light/hood.

I have two flowering rooms, one that was 81 degrees room temps, canopy temp was approximately 86-87. The buds came out fluffier and not as big. My other flowering room is locked in at 75 with canopy temps at 80. The buds came out sumo-sized. It's the same strain i've been working with for 6 months.