Following Vpd Thru Flower

[MIMedGrower]

Here are 2 good links that apply to our type of plant and nighttime stomata opening.

Seems the environment itself is controlling the water loss or not from the leaves. No processes that require transpiration in c-3 plants in the dark but it seems we can boost nutritional uptake by controlling this factor.

 

[MIMedGrower]

Well said. T


Well said.
Thanks. This is my first thread and am understanding the impact of misinformation. That is why i made sure to state that i had no data to back up whether a technique did or did not work. In the future, ill leave out and only share real results based on side by side or controlled experiments.
I do know that i have very likely experienced an increase in yield with the same amount of light and co2 but letting the rh stay within charts. My system is more efficient as a bonus cuz my dehuey doesnt run all day.
Gotta wait for drying to post g/w. Looking forward to reporting on quality as well.
Appreciate all the advice guys...

I have thought about this vpd range chart a lot and I think 3 things.

High humidity is an unessary risk in a marijuana flower room.

It is really a Greenhouse thing where they are not attempting to control heat but humidity to keep within growing parameters.

Not all plants like high humidity.



It is not necessarily the best way to control environment. Indoors we can control heat and humidity. Best results for me are at 75-77 degrees farenheight and 55-60% humidity. After 60% relative humidity you are risking mold unless you raise the temps to compensate. Which would lower quality.

The only thing that humidity really affects is how you need to fertilize and water the plants.

 

[ROOBIX]

This is my 4th grow overall and i started 1.5 yrs ago, so all and any feedback is so helpful. I ask for links here cuz you guys filter google bs.
I get that hot, dry environment increases transpiration rate, making more diluted feeding necessary.
Decrease in quality going above 77? Not sure about that without data. But with respect, "not sure" does not equal "dont believe you."
Going to 90 and 80% at 1500ppm like i did for wks 1-5, i would expect the decrease in quality comments and they would likely be absolutely valid. I say "likely" cuz i just dont know.
Just for fun, i took em to 105 and 90rh in veg before they showed stress. I did 5 degree increments for 24hrs ata time.
I cant flower more than 2 plants(so i do 3) and some of us are looking for heavier yields and new ways to do things. I know if it aint brok, dont fix it. Ur medical and have the pedigree, so i get it..absolute quality. Respect!
I did drop temps at wk 5-6 to protect terps, but this higher temp, higher rh round is more stinky than my last round during drying, same strains. Maybe i shit the bed on the last round?
4 days til i chop this pex

 

[ROOBIX]

Dried papaya ready for jars.

 

[MIMedGrower]

I think the stability of maintaining the temps in a few degree range through the whole grow is more helpful to the quality than the exact temperature.

A steady day range and a steady night range of temps and environment helps plants reach higher potential in my opinion.


There are a lot of variables to the best temps for a given room and strains.

 

[ROOBIX]

Thanks for saying alot in a few words. I never gave thought to the consistency/gradual transition of my grow vs. nominal values of temp and rh. Its hard to stay objective.

 

[MIMedGrower]

Thanks for saying alot in a few words. I never gave thought to the consistency/gradual transition of my grow vs. nominal values of temp and rh. Its hard to stay objective.

Thanks for understanding my post so well.

 

[ROOBIX]

Well thanks for effin that up. Was i more successfull cuz of the humidity, or because i learned from previous mistakes and then applied what was learned? That dried papaya got me thinkin!

 

[MIMedGrower]

Well thanks for effin that up. Was i more successfull cuz of the humidity, or because i learned from previous mistakes and then applied what was learned? That dried papaya got me thinkin!

Wait! I was saying that you got the point. I wasn't being sarcastic.

The consistency and steadiness of a hospitable environment is the main factor.

The numbers are suggested averages. All rooms can be different. But steady with low stress wins the race.

 

[ROOBIX]

Wait! I was saying that you got the point. I wasn't being sarcastic.

The consistency and steadiness of a hospitable environment is the main factor.

The numbers are suggested averages. All rooms can be different. But steady with low stress wins the race.

I totally know what u meant. Thats what sucks about this venue. Tone is not conveyed.
What i meant was, you have a very very valid point about consistency. I cant rule that out as my reason for doing better. Again, its hard to stay objective.
Were all buds here.

 

[MIMedGrower]

I totally know what u meant. Thats what sucks about this venue. Tone is not conveyed.
What i meant was, you have a very very valid point about consistency. I cant rule that out as my reason for doing better. Again, its hard to stay objective.
Were all buds here.

I understood then misunderstood and now understand. Ahhhhhhhh:-)

 

[ROOBIX]

Tangie and pex lookin goo

d at chop

 

[ROOBIX]

 

[ROOBIX]

 

[ROOBIX]

View attachment 758001

With small plant counts, small scale farmerls like myself can pick colas as they become ripe throughout the plant. larger ops dont always have that luxury.
I like to pull the ripest colas as i see them throughout the last 2 wks.
I like the papaya a week early, the pex on time and the tangie about 5 days late.
I been running go in promix and started flushing at day 45 with these 8 weekers.
With the go, i fed every watering (double the base and calmag when girls are healthy, then watch for burn and back off a lil.
I never checked ph, and once a week mixed with a 2 day diamond black/squid/molassas tea.
With go, had deficiencies until the base and cal mag were doubled. Veg and flower.

 

[ROOBIX]

Just filled 7 jars of nugs like these with the 1 papaya plant. They are still a bit wet so i would expect that to go down to about 5 jars or so. Ill post totally dry weights for all three in a couple weeks or so. Nice and stinky. My wife fired up the meat smoker and bought like 20 of the car freshner trees after she woke up this morning.

 

[GrowGod]

Did you have a fungus gnat problem?

 

[ROOBIX]

I did not this round, but i have a sealed room with hepa filter on the intake. I try to clean up any spills/ runoff asap. This is only my second round in soil, so not sure if gnats will eventually show up. Im not well informed on the subject.

 

[ROOBIX]

All new pics get rejected for security.
So here is a pic of the goofy single blades that grow out of 4wk clones.

 

[JMcG]

Good thread. You are getting some good info here.
My .02 cents ( for what it's worth... been around the block a few times) is this.
IMO... these plants are fairly adaptable to changing surroundings. If you don't rush it they can easily adapt to a lower humidity setting.
From what I have experienced higher humidity during flower, especially the later stages will give me a better yield, but keeping it at a moderate to low level while budding seems to give me greater trich production and better bud structure.
I have no science to back this up... just my experience throughout the years.