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Jroc311 started grow question 3 years ago
Hey guys. I just added co2 for the first time. (Week 5veg) Should I raise the temp in the tent? If so to what? It runs at 75avg.
Girl Scout crack led soil
10 weeks
Girl Scout crack led soil Jroc311
Girl Scout Crack
6 comments · 3 years ago
Resolved
Week 5
Techniques. Defoliation
HighTV answered grow question 3 years ago
Fantastic question jroc! You are absolutely on the right track that the plant is able to handle higher temperatures with an increased C02 ppm. However before you can increase the temperatures in the tent you should raise the RH, because the plants Vapor Pressure Deficit is pretty high right now. To put it simply - the plants are fighting to retain its moisture from the air and increasing the temperatures in the tent will make that harder for them! You will want your VPD to be between 8-11 as you enter into flowering (see link below for the VPD chart). To BEST utilize this extra boost the C02 gives your plants in terms of temperature resistance is to first get your RH to 60% to fix the VPD then increasing your light wattage. Any other increase in temperature that isn't in light wattage hurts your end result. I hope this helps with the question Jroc and sorry about the wall of text! :innocent::innocent::innocent:... https://hightimes.com/grow/understanding-vapor-pressure-deficit/
OutForReal answered grow question 3 years ago
Hello ! Short answer : The Co2 is most effective with higher temps than usual when using a "gaz formula" , when using a Co2 bags or any other products of that style then the amount of CO2 produced does not require more heat. And it only work with an hermitic box with no fan on that could blow away the Co2. I hope it will help you :grin::+1:
DasBoof answered grow question 3 years ago
hey man you don't really need to change anything up when you add CO2 these will benefit just fine at the temperature you're at now, basically the temperature component is just another less precise way of estimating VPD which regulates the metabolism of the plant, higher metabolism is alright when you have CO2 because the plant can just do more work from the CO2, that's why it grows faster - i wouldnt tamper too much with your conditions because you're already optimal at 26°C ... CO2 will also do something interesting to your humidity, this is good for VPD, look up vapour pressure deficit if you havent heard of this yet. Good luck my friend, i use TNB myself, that's all you need in a 4x4 :rocket:
mad_scientist answered grow question 3 years ago
Hello @Jroc311 ! How are you going to add co2 ? I f you use a pressurized co2 bottle or a co2 generator and you can control the ppm then it would be beneficial to raise the temps. If you are just using co2 from myco bags and stuff like that then don't raise the temperature because these products are not able to raise the co2 to the point that you need more heat . The reason you want to raise the temperature is because with that way you can increase the VPD. By raising the temperature the plants transpire more so they take more co2 for carbohydrates synthesis via photosynthesis but it has its cost. Because of the high temperatures a lot of teprenes are lost.... Also because of the high amount of co2 that the plant has to deal with they also need more energy to fix it to sucrose. That's why you need more light. In general at ppm levels of 1200-1500 ppm you need a ppfd about 1000-1300 µmol/s/m2 ( an average hps can usually give that ppfd at 800 watt/m2 ). Also the co2 levels must not be above 450-500 ppm during night because it becomes toxic for the plants. You also don't need high co2 levels at veg stage. Start it at about 2nd-3rd week of flowering. Happy growing ! :facepunch:
Removed answered grow question 3 years ago
With average ambient CO2 levels (400 to 500 PPM), the ideal temperature is just below 27°C (80°F); with increased levels of CO2 (up to 1500 PPM) the ideal temperatures increases between 30°C and 36°C (86°F and 97°F). That been said, keep in mind that plants can only use CO2 in the presence of light, so no point in supplying CO2 during lights out; moreover cannabis can ONLY use the increased levels of CO2 if the intensity is above 60.000 lux (usually between 60.000 and 80.000 lux). So the first thing I would do is to measure the intensity of your lights at canopy levels, if it's below the mentioned range, you are just wasting money on that CO2. Good luck mate.
PRO TIP. During the night a bedroom CO2 levels can increase to 1500 PPM easily (this is why a bedroom air feels heavy during the morning); so if you keep your grow space in your bedroom and turn the lights on during the night, you can have free CO2.