Hi everyone. Hope all is well. I wanted to take a minute and talk about how implementing VPD in my grow tent has made an improvement on my current grow over my last grows where I never followed a VPD chart.
First off, it has not been a easy task to stay in the "green" zone to say the least, but with help from humidifiers and dehumidifiers it has become doable. I don't know how much money it would take me to implement this into a grow room vs a grow tent. The tent was hard enough to dial in.
Also I have only implemented this during the flower phase. I did not have my tent dialed in during veg.
The biggest thing I noticed was that I can now let my 2 gallon coco medium go 3 days before feeding again with no signs of any issues. This is a BIG no no in the "coco" world. They are not drinking as much as they were previously. I also noticed that the plants at 4 weeks in flower have shown more pistils and more bulking of flower over any other grow, including stacking. I know this may be strain dependent, but either way I do not foresee me going back to just "winging" my temps and humidity.
In the world of growing cannabis in flower I have been told to stay below 80 ish degrees and keep my humidity under 50%. I am running my lights at 100% with an ambient temp of 83- 85 with humidity upwards of 57-60%. I make sure I have adequate air movement as to not grow any mold. So far I am very impressed with the conditions of my plants. 4 weeks in and they have a very greasy feeling to them when I rub the sugar leaf to get a smell of the terps and the smell alone is crazy. I also noticed that my house reeks. I have never had my area so pungent even late in flower let alone 4 weeks in.
I realize that it is hard for me to compare the grow since this is the first time I am running these genetics, but I can 100% guarantee you I will be continuing this in the future.
I feel like cannabis growers have been brainwashed into thinking they need to keep their humidity below 50% because they are afraid of losing their crop. I think as long as you have good air movement you should be fine at these numbers.
Now, what is also nice about this VPD flower chart is you don't have to run my numbers. If your temp is higher or lower you just follow the humidity percentage to keep you in that green range. The lower your temp the lower the humidity, and vice versa. I will be dropping my light percentage to around 50-60 percent during the last week in flower which will allow me to drop my humidity percentage. This will hopefully help with color and help to avoid too much moisture in my flower.
I just wanted to share my experience thus far regarding this topic. I will be adding more info on any apparent differences I may notice as the grow comes to an end. Hopefully this can help someone with taking their grow to the next level if they choose to do so. I feel it does make a big difference in the plants as it allows the stomata to work the way it should.
https://pulsegrow.com/blogs/learn/vpd-charts-in-fahrenheit-and-celsius-with-leaf-temperature
First off, it has not been a easy task to stay in the "green" zone to say the least, but with help from humidifiers and dehumidifiers it has become doable. I don't know how much money it would take me to implement this into a grow room vs a grow tent. The tent was hard enough to dial in.
Also I have only implemented this during the flower phase. I did not have my tent dialed in during veg.
The biggest thing I noticed was that I can now let my 2 gallon coco medium go 3 days before feeding again with no signs of any issues. This is a BIG no no in the "coco" world. They are not drinking as much as they were previously. I also noticed that the plants at 4 weeks in flower have shown more pistils and more bulking of flower over any other grow, including stacking. I know this may be strain dependent, but either way I do not foresee me going back to just "winging" my temps and humidity.
In the world of growing cannabis in flower I have been told to stay below 80 ish degrees and keep my humidity under 50%. I am running my lights at 100% with an ambient temp of 83- 85 with humidity upwards of 57-60%. I make sure I have adequate air movement as to not grow any mold. So far I am very impressed with the conditions of my plants. 4 weeks in and they have a very greasy feeling to them when I rub the sugar leaf to get a smell of the terps and the smell alone is crazy. I also noticed that my house reeks. I have never had my area so pungent even late in flower let alone 4 weeks in.
I realize that it is hard for me to compare the grow since this is the first time I am running these genetics, but I can 100% guarantee you I will be continuing this in the future.
I feel like cannabis growers have been brainwashed into thinking they need to keep their humidity below 50% because they are afraid of losing their crop. I think as long as you have good air movement you should be fine at these numbers.
Now, what is also nice about this VPD flower chart is you don't have to run my numbers. If your temp is higher or lower you just follow the humidity percentage to keep you in that green range. The lower your temp the lower the humidity, and vice versa. I will be dropping my light percentage to around 50-60 percent during the last week in flower which will allow me to drop my humidity percentage. This will hopefully help with color and help to avoid too much moisture in my flower.
I just wanted to share my experience thus far regarding this topic. I will be adding more info on any apparent differences I may notice as the grow comes to an end. Hopefully this can help someone with taking their grow to the next level if they choose to do so. I feel it does make a big difference in the plants as it allows the stomata to work the way it should.
https://pulsegrow.com/blogs/learn/vpd-charts-in-fahrenheit-and-celsius-with-leaf-temperature
