Can anyone tell me if this is calcium deficiency?

[Just_growing_on]

Looking for helping identifying this yellowish brown spot

 

[Old_fart_stoner]

Could be wrong but looks like phosphorus deficiency to me. Get other opinions though.

 

[Highlife42]

Yes. I believe you are right. Calcium. Only because it doesnt look like it has spread to newer growth. Ca deficiency is mostly located in older growth and cannot be transferred to newer.

 

[Dreminen169]

Phosphorus deficiency but more than likely phosphorus excess. What are you feeding?

 

[Just_growing_on]

Phosphorus deficiency but more than likely phosphorus excess. What are you feeding?

Im using GH and im at 850 ppm at week 4 of veg

 

[Just_growing_on]

5.6 ph

 

[Dreminen169]

Im using GH and im at 850 ppm at week 4 of veg

Yeah, I’m thinking lockout. What ppm scale are you on 500 or 700? That’s why I prefer working with EC.
I would drop to 1.0EC/500 ppm(on the 500 scale) and work back up from there. Also I like to be closer to 5.8pH

 

[Dreminen169]

Also, I don’t know how I missed this before but welcome to RIU!

 

[Just_growing_on]

Yeah, I’m thinking lockout. What ppm scale are you on 500 or 700? That’s why I prefer working with EC.
I would drop to 1.0EC/500 ppm(on the 500 scale) and work back up from there. Also I like to be closer to 5.8pH

I think 500 my ec is 1.5 and thank you! The responses are awesome thanks for the support!

 

[osowhom]

well what happened i have the same issue now

 

[go go kid]

well what happened i have the same issue now

https://dutch-passion.com/en/blog/a-visual-guide-to-cannabis-deficiencies-n987 hope this helps