Mephisto Genetics Temp and humidity??

[FishWizard]

you may need do things like shut vent's etc right before light's out...so stay's warm in there during lights out... I also keep extraction off during light's out.. but you need leave some vent's open if not using any co2 ... I have controlled test area, mine I provide the co2 and everything. it's just figuring out a way to balance your grow area..it can be done...my extraction, isn't used like everyone else uses... I don't need exchange air since I provide the co2 & everything else for them. my extraction run's once every hour for 15mins and off at light's out for 4hrs.

By extraction you mean the removal and replacement of air? Thanks

 

[Jeezum_Crepes]

Hey guys. First time grower. I have a question about humidity control. Im growing in a small 2x3 grow tent in the north east. The humidity is pretty low and I am growing in a loft area so its hard to control humidity in the entire room. Because of the small tent the exhaust fan pulls any humidity thats in the tent out and the air pulled in is not humid enough. (25-30 RH). So my question is can i hook my fan and filter up to an Inkbird temp control system so it cuts on when temps get too high. This way it allows more time for the humidity to build up in the tent. Or do i need to keep the fan and filter running 24/7? Thanks so much!

 

[lunarman]

Hey guys. First time grower. I have a question about humidity control. Im growing in a small 2x3 grow tent in the north east. The humidity is pretty low and I am growing in a loft area so its hard to control humidity in the entire room. Because of the small tent the exhaust fan pulls any humidity thats in the tent out and the air pulled in is not humid enough. (25-30 RH). So my question is can i hook my fan and filter up to an Inkbird temp control system so it cuts on when temps get too high. This way it allows more time for the humidity to build up in the tent. Or do i need to keep the fan and filter running 24/7? Thanks so much!

Get the inkbird. It will exhaust out when its on, and not when its off. that's what you want. You don't want 24x7 exhaust.

you can add a probably a medium sized humidifier in to the tent to get it up to 60%. Once you get in to flower and the plants transpire you will probably get 50% RH just from the plants so you can pull out the humidifier.

 

[Jeezum_Crepes]

Get the inkbird. It will exhaust out when its on, and not when its off. that's what you want. You don't want 24x7 exhaust.

you can add a probably a medium sized humidifier in to the tent to get it up to 60%. Once you get in to flower and the plants transpire you will probably get 50% RH just from the plants so you can pull out the humidifier.

Thanks so much for your reply. I already set this up but just wanted to make sure i was doing the right thing. And after about 5 min of the humidifier in the tent without the fan running humidity is up to 74%!

 

[lunarman]

Thanks so much for your reply. I already set this up but just wanted to make sure i was doing the right thing. And after about 5 min of the humidifier in the tent without the fan running humidity is up to 74%!

Do you know about VPD, the charts that show ideal temp and RH values that will be best for your plants? If you know what RH and temp you're trying to achieve its better than winging it. Can't always achieve it as that might be harder to make happen. Temp and RH play off each other so it's like trying to dial in two moving targets that affect each other.

If your humidifier has a control, you might want to play with that and try and dial in something good.

 

[Jeezum_Crepes]

Do you know about VPD, the charts that show ideal temp and RH values that will be best for your plants? If you know what RH and temp you're trying to achieve its better than winging it. Can't always achieve it as that might be harder to make happen. Temp and RH play off each other so it's like trying to dial in two moving targets that affect each other.

If your humidifier has a control, you might want to play with that and try and dial in something good.

Yeah i have recently started looking into VPD. From what i have seen its really the next step in fine tuning your grow space to give your plants the best conditions possible. This will be my very first grow so i really wants trying to get that in depth with it. But i have looked at it as more of a guide for what ranges i wanna try and stay in. I was thinking about gettting the inkbird for my humidity control as well. Im gonna play around with the settings on the humidifier to see what setting gives me what humidity. Got me seeds today so looking to get this started this week!

 

[lunarman]

Yeah i have recently started looking into VPD. From what i have seen its really the next step in fine tuning your grow space to give your plants the best conditions possible. This will be my very first grow so i really wants trying to get that in depth with it. But i have looked at it as more of a guide for what ranges i wanna try and stay in. I was thinking about gettting the inkbird for my humidity control as well. Im gonna play around with the settings on the humidifier to see what setting gives me what humidity. Got me seeds today so looking to get this started this week!

That's a good plan. Its just a guide that does have a wide range of variables you can change. Its a balance. Take your room or tent environment (esp the exhaust setup) and what its like in general for temp, RH and take your tools like a heater, AC, Dehum/Hum and take a VPD chart and try and get in to the VPD sweet spot. For example that might see you dealing with cooler temps for some reason so therefore you want to reduce RH so you're still be in a VPD sweet spot. Then temps go up, so you can increase RH.

A little bit of advice to pass on. If you're going to run 60% RH or esp if you hit above 70% for veg invest in good fans for circulating air around the plants. That will help the seedlings in veg but also its important for flower and preventing rot etc. If you just cant get excellent air circulation then reduce RH some. Maybe try 50% instead of 70%.

 

[Jeezum_Crepes]

That's a good plan. Its just a guide that does have a wide range of variables you can change. Its a balance. Take your room or tent environment (esp the exhaust setup) and what its like in general for temp, RH and take your tools like a heater, AC, Dehum/Hum and take a VPD chart and try and get in to the VPD sweet spot. For example that might see you dealing with cooler temps for some reason so therefore you want to reduce RH so you're still be in a VPD sweet spot. Then temps go up, so you can increase RH.

A little bit of advice to pass on. If you're going to run 60% RH or esp if you hit above 70% for veg invest in good fans for circulating air around the plants. That will help the seedlings in veg but also its important for flower and preventing rot etc. If you just cant get excellent air circulation then reduce RH some. Maybe try 50% instead of 70%.

Yeah i have been running my tent for the last few days while its empty getting temps. It seems to stay in the 75 range and at night with the light off and a small little heater in the room stays around 70. So looking at the VPD chart seems I wanna stay in the 65-70% humidity range. Does that sounds about right? I have 2 fans actually. One clipped to the side about midway blowing air up and one on the floor of the tent to help move air around under the canopy.

 

[lunarman]

Yeah i have been running my tent for the last few days while its empty getting temps. It seems to stay in the 75 range and at night with the light off and a small little heater in the room stays around 70. So looking at the VPD chart seems I wanna stay in the 65-70% humidity range. Does that sounds about right? I have 2 fans actually. One clipped to the side about midway blowing air up and one on the floor of the tent to help move air around under the canopy.

I think 65% as a high and 55% low point for veg. and I'd drop that 10 points lower for flower. A lot of its personal preference and what is realistic given your environment. I used to try and be precise with it but it didn't seem to be important so now I'm just ball parking it.

 

[Jeezum_Crepes]

I think 65% as a high and 55% low point for veg. and I'd drop that 10 points lower for flower. A lot of its personal preference and what is realistic given your environment. I used to try and be precise with it but it didn't seem to be important so now I'm just ball parking it.

So I started my two pants today! Temps are set at 77 degrees on the inkbird with a +/-2 degree differential that will cause the exhaust / heater to cut on. with humidity of 61%. After having it run for most of the day i have noticed my temps are steady at 78.5 which means the exhaust doesn't come on. Do you think it would be a good idea to lower my temps say (75) that way its allows for more temp fluctuation (temps rise to 78) and causes the exhaust to come on to clear out the air and bring in some fresh air? Would it be a problem to have my temps so stable that it never cuts on the exhaust fan? I know its prob not a big deal as the seeds haven't even popped yet. But just trying to think ahead and get things set.