first DWC grow

Gonna adjust ppm to 350 by adding ph water with no nutes

she’s lookin real nice
 

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Cwrighty9420 said:
I see, Will see where I’m at on the VPD chart in the morning
Click to expand...
Gotta make sure any vpd talk is specifically about herb. Here's a decent site
www.cannabissciencetech.com

Understanding VPD and Transpiration Rates for Cannabis Cultivation Operations

This article explores how vapor pressure differentials (VPD) affect transpiration rates in cannabis plants. Understanding of VPD at different temperatures and relative humidities, and its effect on this process, is important to gain maximum plant growth.
www.cannabissciencetech.com
and another
www.alchimiaweb.com

Vapour pressure deficit (VPD) in cannabis cultivation

Temperature and relative humidity play an important role in indoor marijuana cultivation since much of the plant's activity depends on these factors. Incorrect values of these two parameters will result in an invalid VPD (vapour pressure deficit), which will in turn result in poor plant...
www.alchimiaweb.com www.alchimiaweb.com

and the tables
Veg
Veg VPD.jpg

Flower
Flower VPD.jpg

There's other tables out there and you can definitely calculate yourself. Having the VPD in the correct range definitely helps and makes a big difference in overall growth.
 
Topped up water by 5l
Phd to 6.1
Added a little a+b
Cal mag
Regen a root

ppm of the mix was 595

added the 5l to current rez mixed it around a little

ppm of whole Rez was 395 and ph was 6.2 water temp was 21c Haven’t played with the VPD thingy yet but will get around to it
 
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