first DWC grow

[Cwrighty9420]

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

she’s lookin real nice

 

[Cwrighty9420]

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

she’s lookin real nice

12 days from transplant

 

[Cwrighty9420]

12 days from transplant

Roots

 

[HolyAngel]

Ok so Ppm rose to 480 from 410 so you think I should add plain water until she’s sitting at 340-350ppm and see how she goes from there?
water level doesn’t seem to have moved

yep that's what I'd do. Somewhere around 350 and see what happens in 12-24hours and go from there.

 

[Cwrighty9420]

yep that's what I'd do. Somewhere around 350 and see what happens in 12-24hours and go from there.

Let’s see how she goes!

 

[Cwrighty9420]

Ppm gone up to 355

 

[myke]

Hows your environment,vpd and you got good air exchange?

 

[Cwrighty9420]

Hows your environment,vpd and you got good air exchange?

250watt hps
4 inch extraction
No intake(will fix today)
Sitting around 25-28c
No oscillating fan in the veg tent
Will have when in flower
And I don’t know what VPD is bro

 

[myke]

Goggle VPD. Theirs a chart. Basically matching humidity with temperature

 

[Cwrighty9420]

Goggle VPD. Theirs a chart. Basically matching humidity with temperature

I see, Will see where I’m at on the VPD chart in the morning

 

[HolyAngel]

I see, Will see where I’m at on the VPD chart in the morning

Gotta make sure any vpd talk is specifically about herb. Here's a decent site

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

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

and the tables
Veg


Flower


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.

 

[Cwrighty9420]

She’s starting to go a bit light green, shall I give her a fresh Rez with fresh nutes and up the ppm a little?

 

[Cwrighty9420]

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

 

[Cwrighty9420]

Ppm back down to 345 plants looking a little pale

mod I just keep the ppm around 350? I’m confused

 

[HolyAngel]

Ppm back down to 345 plants looking a little pale

mod I just keep the ppm around 350? I’m confused

If she went from 395 to 345 in 24hrs, when you top her off i'd up it to 450ppm. If she did it in two days maybe try 425.

 

[myke]

ya that sounds low,the color of the leaves will tell you.

 

[Dro3420]

You're going to see other symptoms of low K before tears in leaves I think.

View attachment 4453671
Where did u get that pic from.

 

[Cwrighty9420]

Ah I see she was a little yellow/pale I’ll top her up to 450ppm when I get home

 

[OldMedUser]

Where did u get that pic from.

I chopped up this chart to make individual pics.

 

[Cwrighty9420]

So,,, my buckets leaking, got a inch puddle in the tent...