Following Vpd Thru Flower

[ROOBIX]

Hello fellow farmers. Anybody running high rh following vpd charts? I just wanna try science and see what happens. 3 pretty robust strains, tange kush, papaya, and pineapple express. Gotta fruity clone pack. Vegged for 4wks rdwc, transplanted to 7 gal smart pots 1wk veg to stabilize. Sealed room. 2× 1000 w hps. Used mh into wk 2 to minimize stretch.
Running General organics full line. Even the stinky squid. 92 degrees, 80 rh, 1600 ppm for wk 1. 95 degrees, 82 rh wk 2, back to 92 and 80, wk 3. 75 at night 50 rh whil pumping fresh air thry room. Pic is day 20.

 

[ROOBIX]

Few more pics. Titan saturn 6 and sealed room make for good experimemts.

 

[ROOBIX]

Oh and im plannin to duplicate wk 3 in wk 4. Drop to 88 wk 5, 86 wk 6, 82 wk 7, 78 wk 8 with 400 ppm, following vpd rh all tje way. Please give advice, critique, etc. Were all buds here.

 

[MidwestToker]

I run my perpetual at 72 degrees and the Rh at 55% so I'm on the borderline of the VPD charts.

 

[DemonTrich]

I let my rh get to 65% max from flip to week 6. Then lower each week until harvest at 55%

 

[ROOBIX]

I let my rh get to 65% max from flip to week 6. Then lower each week until harvest at 55%

Whats your peak day temp at 65% rh?
Thx

 

[DemonTrich]

It never goes over 65% for that time.
I use a master greenhouse controller for co2, a.c., and deheuy settings.

 

[ROOBIX]

Oh and im plannin to duplicate wk 3 in wk 4. Drop to 88 wk 5, 86 wk 6, 82 wk 7, 78 wk 8 with 400 ppm, following vpd rh all tje way. Please give advice, critique, etc. Were all buds here.

Day 28

 

[ROOBIX]

Day 35

 

[ROOBIX]

Day 42

 

[ROOBIX]

Normal light before final defoliataion

 

[ROOBIX]

Day 49

 

[mastacheeser]

Haha the plants love that stinky squid tho

 

[ROOBIX]

Yep, makes good food for teas too.
And the smell kinda keeps me from overwatering. I cut it by wk 6, but before wk6 if my room smells like fish, dont need to water.

 

[ROOBIX]

Next generation, top em early, hydro veg, and the into 7 gal smartpots like the last gen.

 

[ROOBIX]

 

[ROOBIX]

Papaya is a 7wk strain. Flushed her then drilled 2 3/8" holes in the main stem. Snapped all the main stems by hand and she goes in the dark for 48hrs.

 

[StandingRock]

I currently do 81 F and 65%. Next run will be 85 F and 75-80%. Co2 supplementation is a must. Following VPD is crucial. If its too dry stomata close and all that co2 you're pumping into the room is wasted and your plant can't transpire and on and on it goes. If you have proper airflow mold and PM won't occur.

 

[ROOBIX]

I currently do 81 F and 65%. Next run will be 85 F and 75-80%. Co2 supplementation is a must. Following VPD is crucial. If its too dry stomata close and all that co2 you're pumping into the room is wasted and your plant can't transpire and on and on it goes. If you have proper airflow mold and PM won't occur.

That was my experience exactly. Ran 80% until final week. Went cool and dry for the final wk.

No mold or pm. Great yielding, stinky plants.

 

[StandingRock]

That was my experience exactly. Ran 80% until final week. Went cool and dry for the final wk. View attachment 757298 No mold or pm. Great yielding, stinky plants.

I was thinking about doing cool and dry the final week too. Nice to know it works