Mephisto Genetics Temp and humidity??

[SHRED]

I have 2 Stilton Specials and a White Chem in my tent.
They are at day 38.
As I try and keep my humidity down during flowering what is the lowest temps I can go? Right now I'm in the 70Fs but I'd like to dip down into the 60F's if possible to keep the air moving out.
Thanks

 

[Dainn]

It's good to keep optimum temps (75-85F ish), temps between 50-70F is prime Botrytis breading territory, Botrytis grows most rapidly in lower temps with high humidity. 40-50% humidity should be fine, on the lower side later in flower. Environment is key, Good luck

 

[SHRED]

It's good to keep optimum temps (75-85F ish), temps between 50-70F is prime Botrytis breading territory, Botrytis grows most rapidly in lower temps with high humidity. 40-50% humidity should be fine, on the lower side later in flower. Environment is key, Good luck

I don't know what Botrytis is.
My temps are in the 70s from low to higher end. And I struggle to keep my humidity in the 60 percent range since I'm near the coast.
It has worked in past grows. The key I think is the oscillating fan on the floor, the 2 fans clipped to opposite poles, and my exhaust fan going. Air movement.

 

[Unique]

I have 2 Stilton Specials and a White Chem in my tent.
They are at day 38.
As I try and keep my humidity down during flowering what is the lowest temps I can go? Right now I'm in the 70Fs but I'd like to dip down into the 60F's if possible to keep the air moving out.
Thanks

View attachment 828154

yeah, that is a bit too low, imo... I'd try keeping no-less then 75-78 degree's your humidity level should come down & balance out.. I think you will just want keep humidity under 50-55% and as nears closer to harvest increasing extraction will lower humidity even more, 30-35% would be nice level to finish off around..light's off temp's should never really below 72, I only allow 5 degree temp fluctuation lights on/off...

 

[Unique]

It's good to keep optimum temps (75-85F ish), temps between 50-70F is prime Botrytis breading territory, Botrytis grows most rapidly in lower temps with high humidity. 40-50% humidity should be fine, on the lower side later in flower. Environment is key, Good luck

yeah, it's true your heading for problems with temp that low... I do agree temps should be up much higher then you currently have them, sometimes ya need add dehumidifier if ya just can't get humidity low enough using extraction... sometimes you have add humidity also, that's something you need to provide for them, sweet spot would be 78-82degree's w/ humidity level around 54% in early flower and slowly bring down over time 45% would be nice target area...

 

[HashyApache]

Honestly if you struggle with your humidity being too high, then you should actually be raising your temperatures instead of dropping them. Higher humidity levels require higher temperatures to ensure the healthiest levels of transpiration. Take a moment and study a Vapor Pressure Deficit (VPD) chart, and see what it recommends to optimize the transpiration for your current humidity levels.

In veg I like to keep my VPD balanced right in the gold zone, and later in flower, I aim to be just to the right of the gold zone with slightly lower than recommended RH. I find this ensures a healthy level of transpiration, but keeps my garden free of the dreaded Botrytis (bud rot).
Once you balance out your VPD I often find that the plants help to control and balance their environment much more efficiently, and seem to grow themselves. Expect much better root growth, and overall vigor if you can find the balance. This chart was an absolute game changer for me to optimize my environment, and when it comes to killer yields, environment is EVERYTHING!
Hope this helps. Much love!

 

[SHRED]

yeah, it's true your heading for problems with temp that low... I do agree temps should be up much higher then you currently have them, sometimes ya need add dehumidifier if ya just can't get humidity low enough using extraction... sometimes you have add humidity also, that's something you need to provide for them, sweet spot would be 78-82degree's w/ humidity level around 54% in early flower and slowly bring down over time 45% would be nice target area...

Thank you for the reply.
I was under the impression Autoflowers could handle lower temps because of their ruderalis genetics?

 

[SHRED]

Honestly if you struggle with your humidity being too high, then you should actually be raising your temperatures instead of dropping them. Higher humidity levels require higher temperatures to ensure the healthiest levels of transpiration. Take a moment and study a Vapor Pressure Deficit (VPD) chart, and see what it recommends to optimize the transpiration for your current humidity levels.
View attachment 828164
In veg I like to keep my VPD balanced right in the gold zone, and later in flower, I aim to be just to the left of the gold zone. I find this ensures a healthy level of transpiration, but keeps my garden free of the dreaded Botrytis (bud rot).
Once you balance out your VPD I often find that the plants help to control and balance their environment much more efficiently, and seem to grow themselves. Expect much better root growth, and overall vigor if you can find the balance. This chart was an absolute game changer for me to optimize my environment, and when it comes to killer yields, environment is EVERYTHING!
Hope this helps. Much love!

Thank you!!

Dumb question.
What do the chart's numbers and colors indicate?

 

[Unique]

Thank you for the reply.
I was under the impression Autoflowers could handle lower temps because of their ruderalis genetics?

hey, i'm sure they "can" handle the temps...but you will pay a price for it..... certain diseases/issue's are present with certain conditions and your kinda in prime area for them issue's/problems also pm can get them at that temp also, very slow growth, etc... a photo plant would already of showed signs, so that's why I say they can handle...but not forever.... the main thing provide environment they will thrive in, it needs be comfortable to you then you'll see how nicely they respond to ya..

 

[Unique]

Honestly if you struggle with your humidity being too high, then you should actually be raising your temperatures instead of dropping them. Higher humidity levels require higher temperatures to ensure the healthiest levels of transpiration. Take a moment and study a Vapor Pressure Deficit (VPD) chart, and see what it recommends to optimize the transpiration for your current humidity levels.
View attachment 828164
In veg I like to keep my VPD balanced right in the gold zone, and later in flower, I aim to be just to the left of the gold zone. I find this ensures a healthy level of transpiration, but keeps my garden free of the dreaded Botrytis (bud rot).
Once you balance out your VPD I often find that the plants help to control and balance their environment much more efficiently, and seem to grow themselves. Expect much better root growth, and overall vigor if you can find the balance. This chart was an absolute game changer for me to optimize my environment, and when it comes to killer yields, environment is EVERYTHING!
Hope this helps. Much love!

I go by VPD, but someone just starting off has plenty of other things deal with. but the chart does help guide people, I always usually show this same chart, I keep one posted outside my test area... I run very strict environment...