Kill 'me or Keep 'em?

[Aqua Man]

Growth as in formation of new tissue etc

 

[Speedypete]

Ok bro so this topic is huge. What are you goals or what are you trying to understand? From there we can start and im sure the conversation will branch out alot because everything is kinda tied together.

First you want to go by the ppfd so you have an accurate idea of the light intensity… so first we need a way to measure that. To do that free a lix meter app will be good enough for your needs. I prefer the photone app and paid for the LED addon but thats not necessary. You will only really need this for one frow until you get the ppfd and distance measurements at the varying heights and intensity i can walk ya through all that no problem.

Then we can go over how to read the plants to determine gow happy they are with the current settings

I worked my way through understanding vpd. I have a good quality light meter now and ir temp. I find all this very interesting.Through reading i found different references to optimal leaf temp for photosynthesis. Some reference 82.4 degrees as optimal although varies strain to strain. Currently running 83 degrees with a leaf temp 79 degrees at 740-780 par

 

[Speedypete]

I worked my way through understanding vpd. I have a good quality light meter now and ir temp. I find all this very interesting.Through reading i found different references to optimal leaf temp for photosynthesis. Some reference 82.4 degrees as optimal although varies strain to strain. Currently running 83 degrees with a leaf temp 79 degrees at 740-780 par

Leaf Surface Temperature - The Overlooked Variable - Aelius LED

www.aeliusled.com

 

[Aqua Man]

I worked my way through understanding vpd. I have a good quality light meter now and ir temp. I find all this very interesting.Through reading i found different references to optimal leaf temp for photosynthesis. Some reference 82.4 degrees as optimal although varies strain to strain. Currently running 83 degrees with a leaf temp 79 degrees at 740-780 par

Thats air temps likely with co2 you can get away with a bit higher but optimal is around 77f many times even studies reference air temps instead of leaf temps.

Now genetics also plays a role because of where the plants originate and the climates they evolved in.

Hiw many hrs a day for light cycle?

 

[Aqua Man]

Leaf Surface Temperature - The Overlooked Variable - Aelius LED

www.aeliusled.com

Ok I haven’t read it all but i can cite you some studies if you like about leaf temp and ppfd… chandra did some great work in this area.

Im not saying they are wrong in all scenarios just that i prefer the actual sties rather than recaps because the studies also tell the variables and controls used

 

[Anthem275]

Thats air temps likely with co2 you can get away with a bit higher but optimal is around 77f many times even studies reference air temps instead of leaf temps.

Now genetics also plays a role because of where the plants originate and the climates they evolved in.

Hiw many hrs a day for light cycle?

I find a room temp of 81.5 to 82 to be about ideal even running co2

 

[Aqua Man]

I find a room temp of 81.5 to 82 to be about ideal even running co2

Exactly the same here bro

 

[Rootsruler]

I find a room temp of 81.5 to 82 to be about ideal even running co2

My air temps are very close to my leaf temps. Is this normal? Aquaman says 75* - 77* is where you want leaf temps. I realize each cultivar is a little different but do your leaf temps sit at around that temp or are they higher like your air temp?

Current conditions in the tent are 76*/55%. Leaf temps are 76*. Some of the new growth is coming in with 5 fingers so I'll let her run for another week and check new growth. They're getting to the point where I need to start LST so I'll see what comes of next week and decide what to do with them. I was thinking if they don't recover I might stick them in the little tent and flower and restart the big tent.

 

[Aqua Man]

My air temps are very close to my leaf temps. Is this normal? Aquaman says 75* - 77* is where you want leaf temps. I realize each cultivar is a little different but do your leaf temps sit at around that temp or are they higher like your air temp?

Current conditions in the tent are 76*/55%. Leaf temps are 76*. Some of the new growth is coming in with 5 fingers so I'll let her run for another week and check new growth. They're getting to the point where I need to start LST so I'll see what comes of next week and decide what to do with them. I was thinking if they don't recover I might stick them in the little tent and flower and restart the big tent.

All depends in light source, VPD, wind etc etc. can be the same, higher or even up to about 10f cooler…. Thats why an IR gun is soooo underrated for the cost

 

[Anthem275]

All depends in light source, VPD, wind etc etc. can be the same, higher or even up to about 10f cooler…. Thats why an IR gun is soooo underrated for the cost

I use a IR Temp gun as well. I have it handy at all times. For me 81,5 to 82 will produce correct leaf temps.

 

[Rootsruler]

New growth is 5 fingering. Tent environment sits at 79*/62%. Leaf temps are averaging 78*

Thanks @Aqua Man and @Anthem275!

 

[tobh]

ha, the IR gun comments. Dude, i bought one years ago and it won't die. I use it for soooo many things. Initially was for LST measurements, but then it became a dog toy, then for agar work, then for cooking, and working on cars, for teaching the kids thing on a whiteboard.... the utility of those things is endless and well worth the $15 or whatever they are now.

i'll give you five fingers @Rootsruler

 

[Observer]

ha, the IR gun comments. Dude, i bought one years ago and it won't die. I use it for soooo many things. Initially was for LST measurements, but then it became a dog toy, then for agar work, then for cooking, and working on cars, for teaching the kids thing on a whiteboard.... the utility of those things is endless and well worth the $15 or whatever they are now.

i'll give you five fingers @Rootsruler

Exactly how it went for me lol

Especially use it for cooking.