When new growth comes in pale light green, without a nutrient deficiency, what can be the cause?

[Rtaym22224]

They are fairly young 12” plants in small containers. I see at least an inch and a half of growth every day but it’s coming in a pale green instead of dark green. It doesn’t need to be fed I just fed and watered it.

Should I turn the lights down/dim? I’ve had it under a 760w 48x48” led grow light running at 65% power. Top of canopy approx 675 PAR

 

[Mallitlahuani]

Dude that’s just how new leaves look

 

[Rtaym22224]

Dude that’s just how new leaves look

Thanks /thread

 

[xet]

The organic acids cause that. It means you are good at growing.

 

[Rtaym22224]

one question, I am running co2 and I’ve read with co2 higher temps are possible. My humidity lights on averages 52%.

Anything above 74 degrees puts my vpd way too high.

Is this ok with co2 being added? Keeping temps from 74-80 with 1400ppm co2 in a controller and humidity at 52 i dont want to raise it. Does co2, it somehow make a high vpd effective?

 

[xet]

one question, I am running co2 and I’ve read with co2 higher temps are possible. My humidity lights on averages 52%.

Anything above 74 degrees puts my vpd way too high.

Is this ok with co2 being added? Keeping temps from 74-80 with 1400ppm co2 in a controller and humidity at 52 i dont want to raise it. Does co2, it somehow make a high vpd effective?

I don't know

 

[troutman]

Change in pH, too much light or too hot?

 

[Rtaym22224]

Change in pH, too much light or too hot?

These are 3-4 week old clones in their original 4x4” grow pots. They were under fluorescents when I bought them. I immediately put them under 500 watts of my led light at around 675PAR at top of canopy

I’m thinking I didn’t let the par build up gradually and they’re being affected by too much light. No ph issues as I ph correct my water and nutes. Ec tds too

My temps are always 74 or below

I have an h300 evaporative humidifier coming tomorrow that I will use to increase humidity in my grow room to 68-70% during veg I plan to veg minimum three months. This will allow normal vpd at higher temps working with my co2


And in a gorilla grow tent I am able to maintain 1400ppm co2 almost all 18 hours the lights are on. I do have to run a higher flow more often because of leakage, but works good enough and a 20lb tank lasts me approx 21 days

 

[exploziv]

one question, I am running co2 and I’ve read with co2 higher temps are possible. My humidity lights on averages 52%.

Anything above 74 degrees puts my vpd way too high.

Is this ok with co2 being added? Keeping temps from 74-80 with 1400ppm co2 in a controller and humidity at 52 i dont want to raise it. Does co2, it somehow make a high vpd effective?

No! CO2 would make it more efficient in a good environment, basically boosting their metabolism a bit. CO2 is the last bit I would add, keeping proper VPD does more for the plants and yeld than adding CO2. To me, 52% RH is the minimum a plant should ever encounter, at the end of flowering when buds are big and compact. So I would try to raise that a bit first.

 

[Creeperpark]

When a plant has plenty of nutrients and turns lime to yellow at the growing shoots it means the pH is high. When the pH is lower the leaves will be a darker green. In some cases using tap water will cause the ph to rise too. Just keep it steady and she will spring back easy without much to worry about.

 

[Rtaym22224]

When a plant has plenty of nutrients and turns lime to yellow at the growing shoots it means the pH is high. When the pH is lower the leaves will be a darker green. In some cases using tap water will cause the ph to rise too. Just keep it steady and she will spring back easy without much to worry about.

Thank you I will dial in ph better and test my soil ph

 

[Rtaym22224]

No! CO2 would make it more efficient in a good environment, basically boosting their metabolism a bit. CO2 is the last bit I would add, keeping proper VPD does more for the plants and yeld than adding CO2. To me, 52% RH is the minimum a plant should ever encounter, at the end of flowering when buds are big and compact. So I would try to raise that a bit first.

I appreciate this