Jumping Right In! Brand New Set Up

[Goodthingsgrow]

RH is just too low really

Do what you have to do for 80% rh and above. Lower temps can help raise it a bit. Go for 74° and see how much the rh bumps uo.

I will see if the towel drops the temps and go from there.

 

[Grownsince95]

No one talks about VPD in cloning but it's actually an essential concept to understand for the process to be successful. The goal is to actually keep our plants out of the "happy" zone so they can relax and not have to transpire without roots.

If you look at the chart around 77ﾟand below, 80% humidity gets you into the red zone. But as temperature increases into the eighties, all of a sudden you're in the zone where plants are doing their thing like they were in a normal state and RH needs to be higher to "turn them off"

Does this make sense?

Lower temps allow you to to utilize a lower rh.

What you dont want is all the way to the left where the values are zero. Zero bad.

 

[Aqua Man]

No one talks about VPD in cloning but it's actually an essential concept to understand for the process to be successful. The goal is to actually keep our plants out of the "happy" zone so they can relax and not have to transpire without roots.

If you look at the chart around 77ﾟand below, 80% humidity gets you into the red zone. But as temperature increases into the eighties, all of a sudden you're in the zone where plants are doing their thing like they were in a normal state and RH needs to be higher to "turn them off"

Does this make sense?

Lower temps allow you to to utilize a lower rh.
View attachment 1065985
What you dont want is all the way to the left where the values are zero. Zero bad.

Yeah VPD is important. I also find my ideal temo first then adjust RH to the temp but always taking leaf temps into account. Quite often you will find leaf tenp and soil temp are very close

 

[Goodthingsgrow]

No one talks about VPD in cloning but it's actually an essential concept to understand for the process to be successful. The goal is to actually keep our plants out of the "happy" zone so they can relax and not have to transpire without roots.

If you look at the chart around 77ﾟand below, 80% humidity gets you into the red zone. But as temperature increases into the eighties, all of a sudden you're in the zone where plants are doing their thing like they were in a normal state and RH needs to be higher to "turn them off"

Does this make sense?

Lower temps allow you to to utilize a lower rh.
View attachment 1065985
What you dont want is all the way to the left where the values are zero. Zero bad.

Did you say we are trying to keep them ‘out’ of the happy zone? Are we trying to get as close to one (the green) as possible?

 

[Goodthingsgrow]

I need to read up on this more. Thank you.

 

[amekins]

Did you say we are trying to keep them ‘out’ of the happy zone? Are we trying to get as close to one (the green) as possible?

No happy zone when trying to root because it demands too much of the plant without a root system to support it. So, let the plant NOT transpire and instead use its energy to root.

The knowledgeable dudes will correct if I have this wrong.

 

[Aqua Man]

Did you say we are trying to keep them ‘out’ of the happy zone? Are we trying to get as close to one (the green) as possible?

KPA of about 0.4-0.6 for clones not yet rooted. Once rooted 0.4 to 0.8

VPD (vapor pressure deficit)

Ok i was gonna sit down and write out a whole article but i have been lazy so instead instead I'm going to copy paste because im lazy. This is not my work so let start. You may find this very long but its worth the read. Some may want to skip ahead. I have added here and there to what i feel is...

www.thcfarmer.com

 

[Grownsince95]

Did you say we are trying to keep them ‘out’ of the happy zone? Are we trying to get as close to one (the green) as possible?

Yes, out. But I was probably being overly simple. @amekins said it great. And if you look at @Aqua Man #'s that is right at that red zone I'm talking about.

 

[Aqua Man]

KPA of about 0.4-0.6 for clones not yet rooted. Once rooted 0.4 to 0.8

VPD (vapor pressure deficit)

Ok i was gonna sit down and write out a whole article but i have been lazy so instead instead I'm going to copy paste because im lazy. This is not my work so let start. You may find this very long but its worth the read. Some may want to skip ahead. I have added here and there to what i feel is...

www.thcfarmer.com

Remember these are guidelines not hard rules. Just because your a bit out does not mean they won't root

 

[Aqua Man]

Yes, out. But I was probably being overly simple. @amekins said it great. And if you look at @Aqua Man #'s that is right at that red zone I'm talking about.

Generally speaking any rooted plant will do fine around 1.0 KPA start to finish. But the post i linked is putting things into ideal conditions for stage of growth. Like I say no hard rule but a good guideline for optimal VPD.

 

[Goodthingsgrow]

No happy zone when trying to root because it demands too much of the plant without a root system to support it. So, let the plant NOT transpire and instead use its energy to root.

The knowledgeable dudes will correct if I have this wrong.

I just heard something click in my head.
Thank you. Understood.

 

[Goodthingsgrow]

This is where I am now. Right in the happy zone! Damn it.

 

[Aqua Man]

No happy zone when trying to root because it demands too much of the plant without a root system to support it. So, let the plant NOT transpire and instead use its energy to root.

The knowledgeable dudes will correct if I have this wrong.

Nope absolutely right. We want to reduce transpiration to a minimum without eliminating it. Even though they have no roots they will take up a tiny amount of water.

 

[Aqua Man]

This is where I am now. Right in the happy zone! Damn it.

I got a feeling the root temls are higher than your air temps because of the heat mat... but I could be wrong

 

[Grownsince95]

This is where I am now. Right in the happy zone! Damn it.

Ditch the mat. Do it in the mid to low 70s don't fight your basement

 

[Aqua Man]

Ditch the mat. Do it in the mid to low 70s don't fight your basement

Or a towel just to create a buffer effect.

 

[Goodthingsgrow]

I got a feeling the root temls are higher than your air temps because of the heat mat... but I could be wrong

Should I maybe just put them in with their moms?

 

[Aqua Man]

Should I maybe just put them in with their moms?

Sure no harm in that is the light cycle and temps are good.

 

[Goodthingsgrow]

Outer room. Maybe too cold I thank.

 

[Goodthingsgrow]

Outer room. Maybe too cold I thank.

Without a mat I mean.