is this Nitro.. deficiency

[Smoke em if you got em]

I got a PPM meter for my work…could use that…no PH better tho…will invest into it today asap.

On my 4th grow, the 1st two grows I just winged it and had so many issues with yellowing and spotty brown leaves but I got a decent digital ph meter and my 3rd grow finally produced enough flower to make me a proud farmer. A decent PH reader will change your life!

 

[paulg]

The issues with tap water are chlorine/chloramine and high pH. It takes a minute amount of Vitamin C to remove chlorine, but much more to lower the pH. For my tap water 1 gr vitamin C into 2 gallons of water lowers the pH from 8.5 to 6.5. So, I’ve got my recipe. Once you figure out your waters needs you shouldn’t need to constantly check pH. Your local utility keeps those parameters stable.

 

[Cannaficionado]

That middle one definitely looks like its got an n deficiency, but yellowing of the lower leaves can be caused by a lot. I battled a lot of yellowing when I started my first grow and thought n deficiency too but it turned out I was just too involved with my garden. Not saying thats what happening here just food for thought