Nitrogen deficiency?

[newgrower17]

Hi everyone, I have a female autoflower about 5 weeks old under 350W CFL's (120W equivalent) that I need some help with. I used coco coir with a product called kind soil on the bottom which is geared towards marijuana and supposed to supply all the nutrients needed with no additional supplements. I have not been adding any additional supplements but lately have seen the claw on several upper leaves, but also the lower leaves are yellowing and turning brown. My thinking is that it is a nitrogen deficiency and the claw is from the upper leaves pulling the nitrogen away from the lower leaves. But this is also my first grow so I could be completely wrong. I have included pictures with the hopes that someone will be able to more definitively let me know if I should be adding nitrogen in order to save my plant. Thank you for any help

 

[Green75]

All that said you did not mention your ph...
looks like ph problem....I see no burns due to nutes..

@...New grower 17

 

[Green75]

Or a combo...

 

[NebulaHaze]

It doesn't look like a nitrogen deficiency to me either. I agree it would be a good idea to check your pH since that's the most common reason to see deficiencies, especially since you're using such a high quality soil that should have plenty of nutrients to last you to week 5 and beyond. Kind soil is good for a wider pH range, but if your water pH is way too high or too low you can still get deficiencies and may need to adjust the pH to avoid nutrient lockout. But since you're growing in organic soil you want to avoid using inorganic adjusters (like the regular PH Up or PH Down from General Hydroponics) because they can damage your microherd (beneficial bacteria).

Luckily, there are natural sources of PH Up and PH Down, many of which you can actually find around the house!

Organic "pH Down"

• lime or lemon
• vinegar
• Earth Juice Natural pH Down

Organic "pH Up"

• baking soda
• Earth Juice Natural pH Up

Another thing to possibly consider is your watering practices, the temperature, and the humidity in there. Sometimes those things being off can cause similar symptoms to what you're seeing.

Overall your plant actually looks very green! I think once you get this problem under wraps it'll start exploding in growth

 

[Royal Nugs]

I see nitrogen toxicity symptoms as well as the yellowing. Your newer fan leaves are "clawing" pretty bad.

I think Greenie and Nebula have you on track though. Looks like balancing PH should fix your problem.

I use Kindsoil myself. I haven't had any problems so far with PH water at 6.0 area.