my rh is 45%, but my leafs have moisture on them is that ok in flower ????

a senile fungus

a senile fungus

Well-Known Member
hondagrower420 said:
No. He vpd is to low causing the plant to use to much water from the roots.
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Once again, I think you are confused as to what vpd is and how it affects the plants. A low vpd would cause stomata to close, metabolism to slow, and the plant to uptake less water.

Afterthought: I give up. I'm going to go do some gardening and smoke one. It seems I'm easily irritated today...
 
hondagrower420

hondagrower420

Well-Known Member
a senile fungus said:
Once again, I think you are confused as to what vpd is and how it affects the plants. A low vpd would cause stomata to close, metabolism to slow, and the plant to uptake less water.

Afterthought: I give up. I'm going to go do some gardening and smoke one. It seems I'm easily irritated today...
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Yes, I think that our views on what vpd is differs.

I don't believe a low vpd would close stomatos.

It's cool bro. I'm not taking you offensively.

I like the multiple points of views.

Plus this is good info to get out. The op is defiantly get information and that is what the thread is for.

It all boils down to the op having a lack of circulation, I believe.
 
hondagrower420

hondagrower420

Well-Known Member
My train of thought is, his vpd is on the low side, causing the plant to transpire more than is needed, resulting in water to on the leaf.
 
a senile fungus

a senile fungus

Well-Known Member
hondagrower420 said:
Yes, I think that our views on what vpd is differs.

I don't believe a low vpd would close stomatos.

It's cool bro. I'm not taking you offensively.

I like the multiple points of views.

Plus this is good info to get out. The op is defiantly get information and that is what the thread is for.

It all boils down to the op having a lack of circulation, I believe.
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hondagrower420 said:
My train of thought is, his vpd is on the low side, causing the plant to transpire more than is needed, resulting in water to on the leaf.
Click to expand...

i believe that you are right about the OP having lack of circulation, and i also believe that i was confused/wrong about vpd earlier today. i thought that i remembered the x axis on the vpd chart to be ascending from 0-100% humidity, which would mean the low vpd is in conjunction with low RH. i incorrectly remembered that, which is why i said that low vpd would cause stomata to close, because i incorrectly thought that low vpd is in conjuntion with low humidity. if i had actually stopped to think about it, and what vpd actually is, i would've realized that my recollection of the chart was faulty, and i would've corrected myself.

i'm typing this out now so that anyone reading this can stand corrected, or at least see that my points earlier about vpd were incorrect.

@hondagrower420 i apologize if i was abrasive and thank you for remaining civil with me while i spread information that you knew to be incorrect.

as you can see, i've smoked one and reread some things on vpd and realize my error, i thought it best to come here and try to correct the wrong... i may have been a bit irritable earlier, but in the last 24hrs i've had a large blower fail, a ballast failure, a water pump seize up, and my new digital cam broke as well. i'm telling ya, when it rains it pours around here...

have a good night yall
 
hondagrower420

hondagrower420

Well-Known Member
a senile fungus said:
i believe that you are right about the OP having lack of circulation, and i also believe that i was confused/wrong about vpd earlier today. i thought that i remembered the x axis on the vpd chart to be ascending from 0-100% humidity, which would mean the low vpd is in conjunction with low RH. i incorrectly remembered that, which is why i said that low vpd would cause stomata to close, because i incorrectly thought that low vpd is in conjuntion with low humidity. if i had actually stopped to think about it, and what vpd actually is, i would've realized that my recollection of the chart was faulty, and i would've corrected myself.

i'm typing this out now so that anyone reading this can stand corrected, or at least see that my points earlier about vpd were incorrect.

@hondagrower420 i apologize if i was abrasive and thank you for remaining civil with me while i spread information that you knew to be incorrect.

as you can see, i've smoked one and reread some things on vpd and realize my error, i thought it best to come here and try to correct the wrong... i may have been a bit irritable earlier, but in the last 24hrs i've had a large blower fail, a ballast failure, a water pump seize up, and my new digital cam broke as well. i'm telling ya, when it rains it pours around here...

have a good night yall
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No man I am glad to hear that. I was scratching my head. It's all good info.

You are very knowledgeable and that's why I kept it civil. You just disagreed with me, I'm good with that.

The op really hasnt give key variable, like:

Medium
Cfm of circulation
And even ambient conditions (temp & rh)

Vpd is looked past a lot in indoor cannibis. Everyone goes off humidity because there is a readily avaible tool to monitor humidity.

I might dismiss humidity to quickly sometimes but cannibis growers need to learn that humidity breeds mold in the environment around the plant which causes mold within the plant. That's it.

Vpd plays a bigger part than humidity.
 
Dr.Pecker

Dr.Pecker

Well-Known Member
hondagrower420 said:
Nice plants. I was more talking to the op.

Do you notice a difference in running fans 24/7 and just during lights on? I ran that way for a little while. I would say my plants stems were more woody with fans running all the time
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What it does is dry up the dew. Plants breathe and it does build up, causing water spots when the lights come on. You could burn down a greenhouse with a water pool on your roof.
 
hondagrower420

hondagrower420

Well-Known Member
Dr.Pecker said:
What it does is dry up the dew. Plants breathe and it does build up, causing water spots when the lights come on. You could burn down a greenhouse with a water pool on your roof.
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I have never grown greenhouse. I ran outdoors for a couple years.

That's a great tip tho.
 
a senile fungus

a senile fungus

Well-Known Member
hondagrower420 said:
@a senile fungus that really sucks when I bunch of shit fails like that. Sorry to hear.

Was it a surge or what?
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Bad bearing on the blower. It's a large squirrel.cage blower and I had it mounted in a funky angle x2. I didn't consider that I was putting too much wear on the bearings and now it makes a high pitched squeal something awful... Lots of resistance to spin freely when powered down.

My grow room is set up differently than most. I built a series of ducts and blow/suck air through them. Each flower room, veg room, and the common area all are actively ventilated by this duct system. The blower that failed was cooling and ventilating four rooms, lol

Thankfully i was in the room when it happened, and i have two extra blowers. I set up my maxfan pro 8" till I get another air mover...

The ballast is just the capacitor. A friend gave me his 1000w magnetic because he can't afford to run it. I accepted it with knowledge that it was used and old and would need to at least replace the cap and lamp.

The water pump is a tricky one. As far as I can tell, it got air in it and seized up completely. How it got air into it, I've no idea. It is plumbed inline into two 55gal drums and is recirculating the water in those drums. Drums are 2/3 fulls so there is 75gal of water there, I have no fucking clue how my pump, situated at the bottoms of the barrels, and inline, would have gotten air into it. I'm flabbergasted on that one...

And the cam has a lens issue. No biggie...

Just another day in the life of a grower...
 
Msmagicbeans

Msmagicbeans

Active Member
hondagrower420 said:
It's called vpd.

Vapor pressure deficit.

It is not normal.

Google is your friend.
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yea i looked it up but i did not know what was going on, i fixed it its not doing it any moor i had to many tops on my plant so i had to cut and thin them out add a fan and now im good
 
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